1967-12-21 — Page 13

育僑墜

0968

四

日十二月一十年未丁屋言

英文中學會考試題預習專欄

生物科

(八)

徐錫褸 T

Biology (8)

Answers to exercises for last week:

naad through the following statements carefully.

ement

If the statement is true mark. "7a or the statement

is false mark "F" in the blank of the statement: provided:

An example is given below.

1. A bird. 13 anamua 1.

2. Afish 15 MARA),

All mammals are animals but all an imma la

are not mammala.

Carbohydrates are any compounds which contain only the elementa carbon,

hydrogen and oxygen.

Bile is made in the kidneys and st in the gall-bladder.

The smallest blood vessels are called arteries.

7. All veins carry deoxygenated blood in the

blood circulation of the heart.

No digestion takes place in large intestine.

Pancreatic juice digests the food as passes through pancreas.

10. Yeast is a one-celled plant that converts sugar into alcohol.

11, Fungi have no chlorophyll.

12. Moulds, yeast and bacteria depend on

other living or dead organisms.

13. Parasites ootain food from other 11t

things.

1. Saprophytes, live on dead organic matter. 15. Fungi perform no usatul function în

nature.

16. All infectious diseases are caused by

bacteria.

17. Most bacteria are either harmless to man

or useful to man..

18. Sterilization means the killing of

bacteria by heat.

19. The gall-bladder is in the liver.

20. The greater part of the human body is

made up of water.

H|| | || | || H | H + + + H |

11. Give a full description of the methods of dispersa) of fruits and seeds with one example for each."

To prevent the competition for water, food and sunlight from the parent plant fruits and seady kr descified many devices of dispersal to Baquira theli wide distribution so as to survive their same species. Generally dispersal 19 brought about four methods:

1. By wind

2. By anima 19

3. By water

hot 4. And by special explosive mechanisms

- Disperszi by vinc:

Fruits and seads, because of their spesifie

shape, size and structure, can be carried awdy from their parent plante by wind

The seeds of some plante (e.g. orchid) are light and small to be blown as dust particles b windi

Other plants te-g. poppy) have a censer mechanism the dry seeds are free in the fruita, from which they are shaken through the pores when the long-stalked fruit is agitated by the wind.

Some other seeds, because of their increasing surface area, can be carried by wind. The sailed fruits of sycamore, the winged seeds of pine, and the parachute mechanism of the fruits of dandelion ire all adaptations of this principle,

Vispersal by anamı”.

There are internal and external methods of dispersal of fruits and seeds by animals.

The

fruits such as strawberry guava mas grapes are eaten by birds and are carried for some distance by them. The undigested seada in the animal body are then dischanged with the fecas. (1.8. internal method of dispersal by animal)

By external" method); Many forms are held such as the adhesion of sticky seeds of mistletos to the bills of thrushes, nuts being transported by rodents and then forgotten or fruits and seeds being carried in the mud on the feet of animal or the clothing of human beings. Other fruits and seeds are provided with

barbs, spines and stiff hairs by means of which they adhere to the body of woolen animals and the clothing or human beings, By this way they are dispersed.

Diaperssi Dy water.

The fruita and seeds dispersed by water must have a large bulk body of decreasing density. They have fibrous and spongy fruite as well as small and light seeds so as to suit for floating, such as, mesocarp of coconut is fibrous and drift over long distance.

Vispersal by explosive mechanism.

Only the dehiscent fruita have such explosive

sechanisms to scatter their seeds to some distance

by sudden bursting of their dry pericarp caused

by differential drying tensions of the fruits, elky sweet pea or violet.

Exercise for this weak:

a) Make a list of Eight named multicellular organiem (plants and animals) that you have found in any one named nabitat (or in a balanced aquarium) you nave studied.

Give a brief illustrated account or LNG LATG history and habits of one plant and one animal from your list.

What is oil? And describe the chemical and physical structure of it. Why do the activities or plants and animals. affect them?

月二十年七六九一曆公年六十五國民華中

*

CITY HALL

WAH, KIU YAT PO

明年度中大入學考試

聯合書院規定

各系入學條件

·擬改爲校,以

接田經鴣南迹地區: NEKO.S

戒耀良好。九、社會工作學系(蹀程自三,鵠院當英爲年花6. 「會還系:狠入學資格考試中文及英文二科 招工承建,他日建成 很入學交格考试地理科成橫良好。八、在校園意設,M已於中 「資格考試管通數醨合格。六,經濟熞系, 元,藉以鼓勵。該項 【通數學合格。五、工商管理缕杀,有入沸. 一百元,季軍七十 「好。四、會計及財及雄米,須入昂脊格音,冠軍「百五十元,蘼 一本科成證良好。二、英國語文學案:鍥 ,須入學資格至台中文及英女二科成後良和易愈望澥樂,許 臺資格考試本科应貿良好。三、慈中墨淤,由校長林子邀博士 能符合該院下列所訂之各學涤入隔之條件【立憲 〔宋案),季 上列入學應具資格外,申請入學者,其嶺 乃傑(土宋系),簡 ,以備詢。(乙)香翠入學條件,除「米聚,軍: 近來在任何學校陰險,但呈橫越的人性名冠軍:谭宗珩( 其品行良好,且幽於入學者。如申灣人最選委員會評選,結果 ,具有最近就業之中學校長證明書,證明宇教授五人組織評 「祗試者。二、入學起嗽已滿十七歲者。三土木工程系主任丁于 一、香奈中文大學入學術件試及格,戒、运行學生日之心,公 F)(N)ESSE-(E)EXE

HİTİT 如下,共收到設計两多鐘, MZ ) ·

THE FREE ∴ : 十八日上午十時

軍:晏妮與物理系

之入學條件,均已公伯,關於鲋合宮院友賽,由學生公開參加 (E)FERINKSIEN LIKSEBER 該校現設三學院十餘學系創作計,於去有 -KNORR-

IPKERKES ISERT SE KAKENE

!數學中申慈:

|學士及社會科學學士學位考試,卻院 n. 別參與香港中文大煜文學士、挪學士、商

·各案「料」及「關科」課程者,可分 聯合書現設有文、理、商學及批 【科學三學院,共分有十二個娶案。凡盛

一、物理及施級必學磁科合格。 十二、物斑,須經資格式化學 華【資格考試化學、物理及高級會學三科合格 合格者優先取錄。十一、就學系:猳入學

KEEN

KHEERKEKAKKEKER...

[屬下之各顔度列館

段,中語文學,英國語文學系、史

學名學學營、潤

社樂院書合聯

動活項首立成

會晚樂音合綜行畢晚今

CEE)=KK

「學、會計財湖學系、工管理學業、經 學聯合醫院樂社,於

丞作經

| 西王、地理學系,社會學系、社會工作, 近成立,目的在管 E BEROK KRE-RE

|浸會學院舉行

校園設計比賽

·生公開參加康

烘冠军

【活動,定今日

一衆合宮院張祝珊· 「期四晚上七時,假

RENKG

TEZE

*-**- VIENE

-ERBAEXSİ H**-*SEE) 整備,無不力求完笋 十月中旬,法院特將·任謖案, ,對校內一切佈置,上線小無影响。本年目,均由影院学生报

•酀院自遥新校舍後賽時探音阿雜,對於結他及各地民歌等項 仏特乚香洗一球场,毗接課室,比獨唱,口,合唱,

演

就會受

O

1968

數學科

犬題驗習書舖

喬仲强

AT

第七次預習題解答

(1)在任意角形中,证明

c = b A cot B+ amß ut A

(E)設 A,B 均笃銳角時,如右图

好示,邊C作 CDL AB,則

CADTDB

rt

CD=ksin A,

A ACD RABCD

M AD = wc A

wt 8,

CD

a sin B.

Au= CDent A == a sim.B cot A.

DB—CD cot 8—4 sinĄ cotB.|

代入得

c— a sin Bast A+ & sinA cat B.

岩A,B角中有一為鈍角蟻測

CD = f sing

B. CD-a (180 – B)

M AD=CPLA

- ang cot A.

BD = CD cot (180°-B) == bain A (~cot B)=.

-AD-BD a sin Boot A- •(~bain A cot€)

asing cot A+ & sin A cot B

(2)証恒等式:

(証)左が

•(tan A+ tan B) x.

(b) (Iano-caco)

= tan A tenb.

ton At Xan 8

cot A + cot B

tan A+ ZenB

Zamo

(18) kj — tans + Cac 8-27

tans+ TanĀ

= tano + me 82 csco ( tang+1)

tam 0+11+ cot 6) – 21.

-(tan 0+1)+ cot 8 – 2×

tam A tam B (to 3)

0 – sec0)2 = 2 DECO.

COS D

-(sec8-cote – 2 ucoast 0) — 2 sec 0 = ( cot 6- seco) — 2 seco (**)

(3)△ABC中) AD薦 BAC六平谷銭

BC at B123

AD

(解)由正

定律

分角質

依合比定理,

「由正弦定禅

sim &

668.

9 sint == log. 768 6:4 + log sin 42° = log(68)

** 24729+T. 8a55

-7.8802

8=49°22" 60 180*38" (3442)

A = 180° _ (B+D) = 180°-(49°22′+ 42) 3 R

=88°38

因AD方向為正比,故AB方向為比偏88*38

X 31 40 12 668 OR. BRA# A#$* *88*58′

(5)(4)証明 ABC的面積

Cor (B-C) + CedĄ) ►

(1) A CHA = CAS [180° - (B+C)) === cos(B+C)} Cos ( B-C)-+ Das A === cos (8-C)-cos (B+C)

sing (B-C+B+C) sing ( 8°C-B-C), 1-2 sim 8 sin (-C)

î pin 8 sinc

Tak simb cin {{CH (B-C)+ ON A}} 又由正弦定律

設

sinA

b

4 sinA

AL

•253 001 (B-C)

E D

No. .LOG.

Zain A+ != {001 (B-C) + cos A}

• cos (B-C) + 603 /

=850), BC=504, <BAC=57° #<B <CH A B

a=5, A=53° sa ex

cas (B-C)+ cos 57°}

1570:

sim 570

<+ sot 570}

Coo (B-C) = sin 57° ( 8×===cot 579)

=sins7° (7:28-0-1u94)

0.6306 ain 57°"

B-C 584"

- 123

(1) (2) # *** **

8= 90° 32′

1306 77997 sin 57° 1.92366

7.7233

= 90°32′ cm 32°38'

·C=32:28!

PBRARIES.

0.8387

3587

0.1-200 +0.4387

sim B

Alm 123°

sin 57°

BD+QC 8 D

0.5.200

-13587 .O. SA

1768

v! BC= 3.4 4λ

6D= 3.4x0.52

1.3587

ZABADY A*****

• BAD — — ( 180° - 123-

AD

sin23°

#Dain 123°.

AD=4910t

AD

1.30X0.8387

0.222)

*20

(4)白200呎高之崖頂測得 A,B两船的俯角各為15°皮

130談A船本達之江南 船在菌人あ42 え距離、文B船在A船え方住?

(解)設如右图C為崖項因由C測A之俯角15

ACZA 15 m <CPA="90"

同理

AD=CD cot CAD

200 tot 15

200137321

-7464 (32)

BD=CD cot 11:30.

200X49:5

·983.0 (02)

*A ABD AB — AD+ 8D*— 2AD* ED GOS 42"

No | Log

0.30/0 746428729 983 299261

!]

— 746·4 +7.83 - 2x 746-u× 983x còs (2 =557100+ 966300-1,091,000

432.400

Cart 42° 7.-87114, AB== [432400 = 648 (OR)

09,000 0376

船

(6) #| A+B+C-T $£•Ą

(修瓜方式=2

Are cos AB.

A+8

At B

AFE)

2π-A-B

B

#1+2 sin A+ (-2_sin, A-8+ (27-A-B), un 8-8-(27-A-8)

#1+2 sim 472 (~2 sin The sin AT

2 sin I

7-8

44 sem IA sin the sin IC (to*), QED

第八次預習起

(1) st. s ABC4, LCSIA, & CD LAB & ABT D. (a)指出图中有那载对“相似三角形”?

(f)那些线段為其他线段的比例中工具

{C)作一正三角形使典已知正方形等材

(d) 作一正方形使興己知正三角形等積.

(2) † 18=HĦj ABC & AB-ACDEF&B A3, 80, CALLE

ZA, ILLDEB=FEC, 91 ABEFACED

(3) PA, PB ZOR ZWW Q2 A8±14ZE Z PRIMO1CA

ZIWARTKiɛ on‡* 30Q; OR 2 441144

(A,日為定直线xy同侧两定

桌,求遇 A, 8作一且在xy上p

CDMR CD=££a.

(5) $180-2£ § P IS –Ħ ABMAL-

AP=318*

又器使AP:PB為定比時,其作法若何?