REFLIANCE MIDSKRI
8 MAR 1975
滴輕育教頁一第張五第日六廿月正年卯乙歴
WAH KIU YAT PO
郭日僑 HALI.
六期星
日八月三年五七九一靨公年四十六國民華中
元位單:
日七月三
計統合綜價市票股所易交證間四港香
CATERER ZER
香港
遠東 收市價 收市價
金銀 收市價
胡市值最高僳
收低價
遼
金銀
收市價:玫市價,收市價
糕
·香港 鼎市:最高價 最低價
遼東
软市耀,收市價
金饑餓 收市價
(一)銀行類 恒生銀行(除息)78-00 匯豐銀行·除各员14-70 海外信託 友聯銀行
(四)地查建築類
78.00 78.00 15.30 14.70
.78.00
15.30 15.30 15.30
•MMUTER
0.84
0.90 10.80
0.90 0.87 0.86
萬邦投資
長江實業
3135
3.60 3.35 3.60 3.55
3.50
2.40
3.95
2.55 2.40 -2.45 2.55 .4.00 8.70. 4,00 3.90
2:50
關懷業
-0185
0.85. 0.85.
0.85
0.85
3.90
興發節~
0.60
0.70 0.60.
9.65
0-65
協成行。
FAT 太古昌: 南太平地
**
EKB
GETTO KING IN
飛痣假..
香港
遠
3.25 3.40
-0.33. 0.33
0.34 0.34 0.34
.0:90 -0.93. 0.88
1.00
0.90
0.90
0.90
1.00 0.82
0.86
0.851
0.95/
二三萬邦航藥 維運航果 顳光航榮
3.55
3.55
2.55.
2.70 2.80 2.70 2.80
2.85
收市價,收市價收市價,
2.20 3.25
:3.35
...0.31 0.32 0.33 3.55 3.50
3.50
3.70
2.50
2.70
2.60
(二)公用類
0.54 0.57
0.54
-0.57.
0.55
PARR
東方貨
1.75
1.76.1.72
1.75
1.76
九燈
15.70
16.20
15.70
16.00
-16.00 16.00
Z
3:20
香港聲
.4.00 4.05
3.90 4.05
14.025 4.05
隆地公司
7.05
3.20
2.70
3.203.20.
2.70
RM
0.28 0.28 ·0,28
0.28
新海康(除息)
7.10 6.85
7:05
7.05
.7.10
Ba
#WA
10.00 10.40
9.90
10.00.10.40-
侶託公司 A
1.85
1.92 1.84
1-86
1.89
1.86
MX
1.18
3.25: 1.13
̇豐話公司
11.60
12.20
11.60
12.00 12.10.
11.80
7.50
7.60
7.40
1:20. 1.23 1.23 7.640
7.50 -
·蹤
遠淇發展
0.52
0.52
0,45
·0.52
0.45
油断地小輪!
12.00 12.40
11.50
12.40
12.00
12.00
和記地 •
3.40
3.50
九腦巴士
4.10 4.25
3.50
3.40 3.50
4.00
4.125
4.25
4.20
0.80
0.95
0.86 0.86
(三)工商企業類
保證®
1.75
1.79
蛳邦A
安達臣
0:45 0.45
0.45.
1.60 1.68. 1.60
1.70
0.41 0.45
0.95 1.74- 1.72
:1.70 11661.65
統一攤爛 金山地
0.86. 0.86
:0,86-
0.85
0.60
0.60
0.60
0.60
0.46
0.50. 0.40
0.46.
0.40.
HOM
0.89 1.00 0.86
1.00
0.98 0.98
(五)會塢類
太古實業A.
9.60
9.70
9.50
9.70
·促銷公司
1.5.70
6:00
5.50
6.00
9.70 .9.60 5.65
新鴻技
5.80
2.10 2.45 2.10 2.40
2,40
2.40
實璃船報
10.20
九龍倉
金門打權
13.40
13.50
13.10
13.40
13.30 13.40
***
12.70
0.15 0.16 .0.15
0.16
"
0.90
0.97 0.88
0.90
0.94 ·0.95
瞥洲英垝(新款)7.60 佩险
8:00
7.60 7.90
8,001 8.00
嘉味
-0.33
0.33 0.33
0.33.
安全貨倉
有益倉
10.00 10.60
10.60 10.60 10.60 12.80 11:10 12.70 12.80 12.70
5.25
0.33
5.70 5,25
5.35 5,60
5.50
1.78
1.82
1.61 1.78
1.75
1.82
太平衮券 恰和證券(除崽)7-00 森那美......70730 利種家海外230 港太投資(暫停一
(十)橡膠類
聯合橡膠 機器借託
(九)投資類 谷企業(除)3-85 3.85 3.70 3.85
1.85185 1.80 5.85
3.70
.A
1.80
5.90 5.80 5.90
5.90
7.00
6.65 6.85.
6,90
7.60
7.30 7.60
2.30
2.20 [2.20
1.77 1.77 1.77
1.77
新世界
1.52
1,58
1.49
1.58
1,581 1.58
1.50
1.57
1.50 1:55
1.50
1.57
永安 和記 怡和
1.85 .1.90 1.851.88
保利工程(暫停貴—
+
其他
.1.90
酒店
2:90 2.975 2.8252.925 -2.925.
2.95
啟明建辦
0.90
0.98
0.90 0.98 0.96 0.98
0.19 0.19 0.18
0.19
26.70.27.00 -26.10
26.80
26.80
26.70
酒
0.73
-0.85 0.73
0.73
0.85-
0.82
城市酒店
邵氏
4.50
4.50 4.50
4.50
大昌地
0.65
0.750.63
0-75
0.74
0-72
海港公司
7.90
.8.00
$7.70-18:00.
转:
8.00. 7.80
.4.20 4.60
4.20.
4.60
江興
4.15 4.204.00
4.20 4.20
平力吸油 瑞與公司 先術公司 澱光電菜:
7.70.
7.75 7.70-
7.75
3.45
3.703.45
3.70
大新公和 萬生:
.1.32
1.35
1.28
1.30
1.28
1.28
大酒店
8.80"
6.90
6.65 -6.70 6.70 6.75
南華早報:
0.28 0.30 0.28
0.30:
山帝國·
0.30
0:30
0.25. 0.30 0.29
永安人壽
1.23 1.25
1.23-
1.23
紅費石
10.50
11.00 10.50
11.00
.3.30
:3.60 3.25
3:40.
11:00 3.60
10.80
MATHER
-0.45
0.54
.0.45
0:54
-0.52
吳覽器:
8.00
8.00
7:90
8.00
-7.90
大石樂
0.46
0.50.
0.45
0.46
3.40
屈臣氏
2.20 2.40 2-20
會德豐AFT CP
3.625 3.675
3.50
3.625
2.30. 2,40 3.65
餘利業 大生地產
0.21
0.21
0:21
0.21 0.21
SKE
6.50
6.70
6.50 6.80
6.50
6.70
1.18 1,34
1.18
1:34: 1.30
百樂
0.25
0.28
0.25
0.25
-0.28
建屋貸款 港機工程
13.50 13.50 13.50
13.50
24.00 24.00.24.00
24.00
24.00
3.625
BARE
0.35
0.43
0.35:
0.35
0.43
(七)舫糖黏衣類
1.95 2.025 -1.92
2.025
2.00 1.98
捷聯
-0.62
-0.70 -0.62
0.70
0.68.1
九龍交易所上市股
南豐紗廠
2.125 2.30
2.125 2.30
香襛企業
0.70 0170
0.65
0.70
0.65
榮漢:
0.72 0.75
0.66
-0.74
0.75
0.72
·新馬製衣
5205
5.05
太古洋行A 亞洲保險 南明
6.556.70
6.20
-6.55
4.50 4.50
4.50 4.50
6.55 6.60.
理光
5.05 5.05
Dart
最高じゃ
最低似
收话施
0,54
·0.60
0.54.
0.59
.0.59.
0.60
4.50
海港工程
1.00
1.00 1.00
.1.00
HEYE
保品
馬廠
(0.60
0.60
0.58
怡和嘗菜
忠正國際 大元
0.42
0.42 0.42
0.42
國際實藥
會德豐砂線
5.80
5.30 5.30
0.25
0.25.
0.251
莊子集團
0.65
0.80 -
連卡佛A
13.00
13.30
0.65 0.65 13.00
0.80 0.72
0.50
0.50 0.50
0.50
永迎利
13.20
13.00
20#
BIJA ETERNA 兆安
0.60 0.65 0.60
0.60
雞無糖
周生生
0.52 0.54 0.51 0.40:
- 0:54
0.51
0.42. 0.40
0.40 0.42
南野査薬(良) 1.00. 1.03 長江衣(除息)
1.00
1.00
1.03
|书
0.55
-0.55
0.55
永鴻越:
智昌、
2.125.
2.125
2.10
2.10
̇娥都地
鹽:
2.50 2.80 2.50 2.70 0.42 *0.42 0.42
2.80
2.65
(八)葉類
0.42
BRTHER
4.15 4.30 -4.10
4.15 4.10 4.20
|成交數,香港為三千二百六十一萬元
金銀嵩四千零六十三萬元
遠東爲六千三百一十三萬元
རྞྞསྒྱུཥྭརྦཱ1}ཞཱཐུཿཤཿ དྷྭ།༐ཎྜ།༐། ༈1 སྠཽ 19 1|།༞ ། |:|: སྦྲུ༐a 1 །ཏཱཾ ། །ཤྩ ། ཁྱུ
くく
क्
***
战
10975-
橋
中蘭會考專欄
:堅镇書院主編:
2. TARUN
4尺較
5. 静止野豬與
生物科(甲)·廖國駕
2.
配肉的嫩成肌肉的緊張掛收
EGAR
冰船
+
REMBLEMAS,
• AMAMLAN
KIT
上
*ky a ak
SF
KER *** BLARE 伸出水面呼靜止時向下垂,經回味 HUA BAR, ATAU B«• ${Rkarb
產卵機死,似在秋天孵化的蚊亦将 潛伏机房建表懷的至明年。
戒奶森和烯的真實
E &
物
KARERA BHULATO 系焼
三上期答案:
* 2 BIR, I WAS; 84; h,
by káu; É. HBO, CHORE, M dari
SÉMIA, ONITOR, ABushes oli
BARAKA
RA *** ** **
ERM NEČI KE 12
AZRAT
ARBARG*.
«MA #Arà? RETAIN
24BE-ATREŠAKIN
・18 鈴間
磺酸吓村一笑所構成之外骨骼)
有聘氏排淇译。
4
S, OH -##
生物科(乙)・廣美華
BIOLOGY (#17)
Q.22. Give an account of the
process of photosynthesis. Photosynthesie is a process by which carbon dioxide and water are connected into carbohydrates within the green tissues of plants.
In light, chlorophyll contained in small green protoplasmic called chloroplasts, causes carbon
water to react, evolving dioxide
simple sugar.
by light (sola
energy
and
en and. oxygen
bodies
The energy bed in the organic energy) molecules as molecular
The action maş
(potential energy).
be expressed ass-
6002+ 6 H20+ solar energy
106 +206 + 502
(potential energy stored in
food)
N.B. For those of you who under- atanda chemistry the following diagram gives you an idea of tha chemistry of photosynthesis, high energy electron
Chelp le farm
•·energy contaking
solar energy
compunde tu
35 'ATP)
#
pe eriod, lear a and b were teaten experimentally for starch.
a. Describe the test used, to test
for presence of starch.
b. State what will be the appear
ange of A and B at the end of
the starch test experiment.
c. Explain these results.
d. Why was it necessary to keep the
plant in the dark for 24 hours
before starting the experiment?
Split card lival.
with cotten weal
that had been soaked
Un line-water
caustic soda
-kat
a) Leaf A and Leaf B were removed from the plant and plunged into. boiling water for about one minute in order to soften the epidermis and make it more permeable.
Both Leaves were then trenam ferred to a beaker of methylated spirit which was kept in a war water bath for several minutea in
order to remove the chlorophyll,
They were then washed in Wa water, both appeared whitish in colour.
Some Lodine solution was then spread on both leaves. A change in colour from "brown to blue black... would indicate presence of 00.
b) Leaf A-half the leaf (the
portion near the apex) remained "brown while the other half turned
blue blacks leaf turned blue Teaf B the
hance a portion of loaf A was
)
inclosed in the flask containing
jaustic soda which has a tendency
So abborb carbon dioxide, that part. of the leaf was deprived of any
on dioxide carbon
We know supply
for photo- necessary synthesis, thus being deprived of an essential material reeded for photosynthesis, it could not carry out this process, thus no starch was made and so when tested for etarch it was found to be absent. The other portion of leaf A and leaf B were left in the air where there is CO2 present were able to carry out photosynthesis thus they were found to contain starch d) It was absolutely necessary to keep the whole plant in the dark for at least 24 hours because the only way we can prove experimentally that photosynthesis ha
-taken place, is to show the presence of starch,
the end product of photos a
Thus, by keeping it in the
been any starch that had
made by all the leaves would
have been translocated Le reconvert nd to
and either removed to goluble sugar storage organs or were used in the dark by reapization, This procDES of keeping the plant in the derk is known as a deste ching procese and is an essential step before doing- any experiment involving proof of photosynthesis.
Review:
1. Which of the following elements are constituents of chlorophyll?". 1. carbon 2. iron 3. nitrogen 4 phosphorus 5. magnésium at 1,2 & 3 b= 2,3. & 4 ca 1,3,5 3. 2,4 only ei some other combi- nation
2. Plant need the element nitrogen:
chlorophyll
accepter
(absorbs Yadiaator
H20
Photolysis
H2O
.+.
ATP
CO
Cenergy
e. nitrogen gas (4)
404+284010/
c. nitrites (NO2)
b. nitric acid (NO)
bekk Ekon
・便
Co-Salem 12 shkëmbit g
地方
痛
后便在空中交绳,此時的
A
三天王漿後纖纖吃蜂蜜、花粉,将来成 费再化成成蟲者,此燦警雌性,豬推 蜂雄蜂胶成不需經精子受奖糖尿病
***.
***
**
7. WE SEN ÉS SE JE KAR NAGA ZE VOLAR 把較大,静止較小,静止啞
****
5. AVERSEN
SAMGASG
地
4 $*£## | 4. ÁRAMMATIS
幼化時
****
60 Sugar SHCHO Catal Dark Reaction
Light Reaction Why is photosynthesis so important in nature?
From above, we know that photo- synthesia is a process by which inorganic materials are utilized to fom food which is the source of energy needed by all living things. In other wo:
ords, plants are the "atore: house" of energy and it obtain it "stores" through the
of photosynthesis. process of
All
living things rely directlyin (herbivore
rore) or indirectly (carnivors and omnivore) on plant for its food and ultimately, energy supply.
(N.3. Food-Chain). good share of
what coonomista term "wealth"
originates directly as a conse-
from
quence of photosynthesde.
Our heritage of coal, oil and
mother earth are derived from the remains of living organ- iems and thus from photosynthesis.
To oonolude, man's very ex- istance depends largely on photo-. synthesis.
Q.23. The following apparatus waE
in the dark for 24 hours before
· '.
set up. The green plant was kept
being used. The whole apparatus
was then placed in the sunlight for 6 hours. At the end of the
This is absorbed as
d. nitrogen dioxide. (NO2)
e. uitmtes (*NO).
3. In testing a leaf for starch,.
the following steps are performed:
1. Boil leaf in alcohol in a water
bath
2. Place on white tile and add.
lodine solutica
3. Plunge in boiling water for 1
minute.
4. Dip
in warm water to soften .c. 1.2.4.5
a. 1.
4.
e. 3,4,1,2
4. 3,1,4,2,
4. The product of photosynthesis
are:
1. chlorophyll 2. oxygen
3. water 4. carbon dioxide
5. sugar 6. energy
a. 1,3 only b. 2,5 only
c. 3,4 only d. 2,6 only'
e. Some other combination
5. In photosynthesis, the role of
chlorophyll is
a. as a catalyst in the combination
of 00 & 10
bag one or the reactants
c. as one of the products
d. to convert avger to starch
**
to convert light energy into forms of opergy which drive the roactions of photosynthesis,
化明科(十七) 陳湛杰
CHEMISTRY
(#17)
Solutions for Chemistry (#16) Conventional Questions
toms.
1.(a)(1) When a metal combines with a non-metal to fom a certain con-- pound, a state of stable electron configuration is attained in the. metal well as the non-metal
This is usually accomplish .ed by electron (one or more) trans- fer from the metal aton to the non-
etal atom, whereby the electro- static force binds together the resulting ions. Such is referred to as ionic or electrovalent bondin
(11) When two non-metala com- bine,
onde usually ion is
atable TNBC configurat-
by sharing one or more electrons between the two atomic sites, Such type of bonding where it involves no sepe- ration of charges in the resulting compound formed, is termed as
the covalent. Nevertheless, covalent bom may have considerable ionic character because, in general, the electronegativity of the two non-metal atoms is different.
(1). When potassium chlorate (b)(1). decomposes to form potassium Chloride and oxygen, as shown below
280103
Diagrammatically, the electronic structures of the produota are:- (Considering the outermost shell only).
M.B. the cras x represents the. electron transferred from K atom to CL atomi
K and 01
"respectively has the electronic structure of Ar atom
Through electron-sharing, each 0. atom 'then aroumes the electronic structure of Ne atom.
The
(11) Potassium chloride is expected to have properties of an ionic compouni viz., high m.p. and b.p., high lattice energy, conduct electricity in fused form and in aq. solution and well-defined crystal structure, soluble in polar solvents 8.g. water and can undergo fairly rapid ionic reactions with other
er similar ionic compounds.
oxygen is gaseous underordinar
and b. p. 1- conditions, with low m.p. In fact, covalently-bonded compound are often 54908,
conduct solido. It does quid or soft.
in electricity; usually ins
insoluble polar solvents but soluble in non-
solventa e.g. polar. (organic) benzene, carbon tetrachloride. Under ordinary conditions, they react rather slowly with other covalent compounds.
2. (1)(a) Themal decomposition of the dark brown solid of lead dioxid occurs when heated, 981-
2PD0+ 02 ↑
2pb02
"The splint stops burning" indi- cates the completion of the decom-· position. Pbo is yellow, which is the residue left, insoluble in dil. HSO, because PbSo, which is formed in the first instance, is insoluble and coate the surfaces of Pb-PbSQ la white.
olves in HNO, to fellow Pbo dissolves
Unatasolved form soluble
material £8b/s) e impurities
present in the original sample of Pboy
The filtrate one portion of
givea which is added dil. So
4 285-
complete precipitation Pb50
ТЬ
+80
15
white
it can be seen that direct for. nation of Pbso between Pbo and H50, gives a very low yield of an tapute desired product.
Exde as
(b) Pura dry lead hydroxide can be obtained by adding NaOH to the other portion of the filtrate until precipitation occurs, alkali should be avoided because the Pb(OH), fomed will react further with the excess alkali to give sodium plumbite which is Boluble.
The precipitate in filtered, washed with distilled water and dried in a iesciccator containing some silioa gel or anhydrous CaCl2.
3. (a)(1) Cathode: Pure Cu. Anode: Cu with small amount of Zn, Fe. Pb, Ag.
(moderately cond
Electrolyte: Cus
aq. solution) When an electric current is passed between the electrodes, at the anode1 Asawing the impurities are distributed homogezously in the acuper slantmia, then, from the surface of the immersed part of the electrode, în man into the solutig
rirat as Zn**
26.
Zn** This is followed by Fe, Pb, Cu, in the same order as that of their positions in the electro-chanical series. Ag lies well below the H and Cu in the series, its going in to the solution is not likely to occur. When
solution as Pffeves into the
it forms inso- lubis Fb50 which blocks up some of the active sites of the immersed" electrode. This in turn lowers the rate of electrolysis alightly. In general, oxidation occurs at anode,
(1) At cathode: Reduction occur with the deposition of Cu from Cu in the
the solution. Ou + 20
¿Cu° (111) in the solution: the
Gu++ content. decreases slightly because when Zn, Fe, Pb, go into the solution, Cu te still deposited at the cathode SO content alao decreases very slightly because of
(b) 96500 coulombs of electricfty liberate ga-equi. of any chemical alement. For Ou,
Cu + 28
Cu
the equi. of Ou to be deposited 63.5
A current of 2 amp. passing for one hour
2 x 3600
500 8.
i.e. (3600 x 2) coul. gives a deposit of Cu of 53-5 x = 2.369 gm.
2:37.
QUESTIONS FOR NEXT WEEK
1. What do you understand by the terme unsaturated, saturated and superaated solution? Describe
otly how you would proceed to exactly determine the solubility of potass- ium nitrate in water at 15°0
2. What are the different methods available for the preparation of ethylene? Give reasons for the
structural formula you assign to it
【物理科(十七)
PHYSIOS. (17)
Solutions AwK(an)
Sound WAVES
陳永爍
Electromagnetic
Waves
1. longitudinal 1. tannsverse wave
WEL
2. speed:330ms
(approx.)
3. requires
material media
4. caused by ̄à·
disturbance in amateriel
medjus
2. speed: 3x10 me
3. transmite
through vacuum 4. caused by a
disturbance in electromagnetio field
(b)(i) Echoes are due to regular reflection of sound at a hard surface which is at least *L* from the observer.
The distance is calculated with the knowledge of
(1) Sound pereists in human ear for
about To
Esconde
(2) Sound travels at 330° mel
For the echo to be heard at a separate sound, the time inter val must be more thani
that TOB
2L 330 x 2133
16.70
Echoes are heard if the reflecting surface is at least 16.7m or 55ft from the source. (ii) Resonance occurs in a body when it is set into vibration at its own natural frequency by receiving a stimulating impulse of the same frequency as the vibrating body.
(0) (1)
The ringing or an electric bell dies out when air is exhausted Silent vibration of the hammer is still going on.
If air is resumed
the
bell jar, ringg ia heard again.
Sound required material media. for its trang- miselon.
air exhausted
九體為七百三十七
boart. D is a sound barrier. Direct transmission of sound from the clock through D is avoided.
Cylinder A is fixed. Sound; smitted by the clock, incidente
into the reflecting surface at an.
angle 1.
Cylinder B is adjusted until a loud noise is heard. Messure the angle r. It is found ALI
A
t
If the two wayes A and B are. identical in amplitude and frequen- cy, and 180o out of phase, a period of silence is produced.
12. (a) The same musical note sound- ed by different instruments differe in.ite "quality" The richness of overtones blended.
(b)
Velocity of sound: ind re8985.
or
It is directly proportional to the square root of its absolute temperature,
Velocity of sound is inde pendent - af air.
19TUBBUTU density
and density =- Increase in
**6630
volume
pressurs' causes. a proportional decrease in volume and consequently the samе, pro- portional increase in density.
Velocity of sound is inde- pendent girdita ampla tude as well as its frequency.
(c) Sound travels by A
two paths from A to B:-
Via: AB
Distance = 200 m
Velocity 340 me
Time taken
Via ACB
Distance=
Time taken
200
340
2(1002
2(1002
340
Time Interval between them
2 (1002 + x2)
-2(1002 + x2)
11002 + 2 (1002x2)
*
142.5
240
142.5
142.52-1002 242.5 x 42,5 (10306.25). 101.52
They are 101.52 m from the cliff. queations for this week
1. (a) Describe an experiment to measure the velocity of sound in air by using one tuning fork of known
frequency and a suitable tell cylindrical jar and a big glass tube with both ends open.
(b) Explain with the aid of th
transmite or diagrams how sir carries sound wave and show on your diagram where the air pressure la greatest and where it is least. Also indicate on another diagram how air particles are displaced aa the sound wave passes it and show the distance through which it movea
− → »·85 m This is an open pipe sounding its fundamental note.
(1) Draw a diagram of the same pipe
souriing its second harmonio. (11) What is the wave length of its
first overtune?
(iii) Find the frequency of the
first overtone if the velocity of sound in air is 340 m/s.
2.(a) Distinguish between pro- gressive and stationary waves.
(b) In an experiment of Bonometer, the tension of the vibrating string is produced by adding weights in a pen. The following results are obtained using a fixed length of
wirei *****
3 15 256
512
Load in pan (kgf) frequency of note (Hz) (1) What is the weight of the pan? (i) What would be the frequency of
the note with no load in the
pan?
(o) Two wires A and B are in unison when sounding their funda- The wires are mada mental notes.
of the some material.
If the
length of A is increased by 10%. What is the percentage change in the tension af B in order to restore the unison?
No comments yet.
Private notes are available after approval.