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WAH KIU YAT
報日僑單
日三廿月一年九七九一曆公年八十六國民華中
華僑經濟
月,安達臣大亞,凱電沼店,長江實業 「等。週息粢下降背計有铆合企業, 「暑地產,裕奈,華光地產及合德衆
·華建築,橡膠台,太古地產,大
「地產,恆生銀行,港燈集團,信託
·銀行,立興,東方貨載,保
心者計有聯合報膠,東亞銀行,四海 |週息百分率互見升降,退点率上升 「與市價有榮兵,故去過各項股現之
去週港股價榮辱互見
週息百分率稍多跌
精
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九倉
, 此公司
六、一八六〇七 五二四 五兰园
合和
電話公司 BER
【百分率與上一週比較列下:
日 游地小雄,金額,和記黃埔,怡和 二置地公司,大酒店,甚話公司,淮 製,新鴻基地產,泰盛,发 銀行 一;海外信託銀行,泰州地產、生力 證券,九龍巴士,連卡佛,創
東發展,盡°C,恆,中華煤氣, ,永泰及南聯實業等。登將在远息:
「九魂巴士:
怡和證券 連卡佛A:
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月的油倒有所行動。 据及生赤学,因此OPEC可望去深結十八個| h 畫,阿拉伯人士說,由於沙烏地阿拉伯今年可
來的石油收益銳融。 測,已經使一九七三年十二月油烧暴被四倍以
三百五十億美元的對六,使神OPEC的樞髅 ,卡遠和謙介詞進料大公國每年二百五十億至 许多色孫有了你节,但是沙國、科成特、伊明 ,見從一九七六邵以來,十三個會員國中有
油潑價的巨大收支剩餘,正在璇絕。 石油鍌出國家[織(OPEC)椅基於石
生活中有沉尼,都已經一反過去反對 : OPEC湘置設大石油网为國和伊朗的石 ,而主殿小幅史提高
EC國家的貨,服煨熟和產油國的龐大發臊計 :世界石油過倒,工業國家經濟後崦10P
·年彤年將逹一百二十億美元。5. 國將外嫒從經常帳內扣除,而美國則將之列餞可控制的变雀。 甘,深沙國人士儿,總支出將超過經說人,不足之激將由政府的儲蓄帳補足。 ......近至一九七六年,吴沙兩國的官方預側,關霹袀國的端餘到一九八 -美沙爾過對沙匾收支平衡估計的海異在於對设國外援解釋的不同。沙 據美國估計,沙说今年的經常棧州餘可接不會超過三十億美元。但是 化一九七四平斯湾大百億至七百億美嚏,油價暴潑後的第一個幾乎。 「億美元降五%。這項州京在一九七五 一九七六年估計選四百億美元, 美殴估計,大軍OPECM环僻一百八十億美元,將比前年的三百大
一年的姁係大約四百億美元。選項預測今年已經大減。 OPEC、等财和國際「織預測,到一九八○年代初爲北,每一
百案。
OPEC是否科赤争或刺俟的主崧關鍵在於它們的外援數字。一
·美國倘有三. 的沙國市場 - 美國人所涉反的金融和按爾登述超過三
是沙園唔差,這是所有勞務方面則有利美國(不包括沙國在英國三百八十 | 沙感跟美國的經常帳平衡,今年將處於赤字狀濺。兩國間的貿易仍然
OPEC在最近一
·低是龔商務部說!一九七七年,美國眾所有近東國家的貿易已有六十 一億九千四百萬美元的貨物,大部分是石油,旨伊朗進口二億美元貨物,
在一九七二年,轉個島進口
-億美元赤字。
「二」,四霑,低於去年同期的一三十五岁。
但是去年的趨勢已經離變。六六月爲止,近東國家的進口佔美國市場,
(饰著自紐約時報).
,
a
ABCD is
parallelogram and
CEFGia a straight line. Prove that
(ii) Let the tension be T
150
J18
200
18
1979
中學會考試題預習專欄
數學
明德出版社文長波提供資料
10. If sine and cost are the
roots of the equation
3x −4x+k=0.
8
Find the value of k. Find the quadratic
equation with roots tanė
and
taue.
(a) G
ED.
ED
FE EB
-
(a) CE =EG EF.
In the figure
Mathematica 16.
Exercise 8
Anaver ALL questions in
Section A and any Six questions
in Section B.
Section A
1. For what values of p, q do
2
the equations £x +5px+7q=0 3x+(&q−1)x+9p=0, have the same roots for x?
2. Simplify
−(c+1)xic
3. A, B and C start at the same
time and in the game: direction, to cycle round a circular course of 1980. If A:cycles 350m/min, B cycles 264m/min and Ccycles 198m/min and they all start from the same point, when will they next be all at the starting point together?: 4. A train 100a long runs
through a bridge 35m long. 45km/hr. How long will it take to pass it completely? 5. Solve the equation, giving a all solutions from 0) to 360. sec A+/3tama
In the figure,
120
PA and P} are tangents drawn- from an external point P to touch a circle, centre 0 at A and B respectively. /APB=120 and the perimeter. of the quadrilateral (APB is 10cm longer than that of the sector. 40B. (shaded in the diagram.) Calculate the radius of the circle.
In the figure,
ABCD is a “parallelogram, DE-2EC. Find the ratio of AF to FC. (Geometry theoren need not be quoted when used) 8. In the figure,
8cm.
6en
VABCD representa a right pyramid with rectangular base. If the height VG is 10cm, AB-8cm and BC=6cm, Find the angle between (a) VA: and the plane. ABCD. (b) Planes VBC and ABCD. (c) Planes VaD and VBC. 12. In the figure,
4cm
a frustum of a cone (formed by cutting a come through a plane parallel to the base. has radii 2cm and 4cm and the distance between the two end faces are Jom apart. Find (a) The height of the cone
which the frustum is cut. (b) The total surface area
of the frustu址. (c) The volume of the
frustum.
13. Draw the graph of
。
y=2sinx+3cosx for value of
90 Find
x from 0
the values of x between
to 90% if
(a) 2sinx +5c08x
-maximum,
(b) 2sinx+3cosx
(c) 19вinx +156, 53.54
2 men set out to meet each other from two places 330km. apart. One travela 30km the first day, 28 the second, 26 the third, and so on, The other travels 20km the first day, 24 the second, 28 the third, and so on. When will they meet?
15. In the figure,
物 理
(十六
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PHYSICS (16)
the object distance.
the focal ring
be determined by
can
Suggested solutions to Teat Eight
(b) The focal length is 20c
(b)
1.(a)
<BAC
90
∠BAC= 30
Let the refractiv the glass prism be
Index of
ain 50
ein 30
(0.766 0.5
32N(An8..
Consider the onvex lens only
the tension should be
32N.
Let the length of A. be b
the tension of Abe T
and the diameter of A be ·d.
the length of B is 1,
the tension of B is IT and
the diameter of B is d.
Consider the formula
Real-is-positive
60cm
60cm-10cm:
50 cm
1.532 (Ans
(b
Conaider the refrac
the concave len
From part (a), when the angle
of imaldemes is 50 the
angle of refraction is 30°.
30
180° 120
180
30
using the fact that
ht path is reversi
50°
r.
-33 cm
Since
12 is virtual and is
33c CH
in front of the concave lens.
Magnification produced by Li
60
where
fundamental freq
ney
vibrating length
T- tension
ma38 per unit
length
Pis the density of the
wire, then
where ris
the stretched wire
the radius of
where
the diamete
of the
T
21
AT
2
pre
aced by Lo (1)
frequency
Total magnificati
Therefore
the final, inage
is virtual and magnified
Size of the final image
2cm x
frequency emitted by Bis
Jd(t) / Pπ
(2)
(2)
(Ane
H is the tre of AABC,
BX KC. If
Find: /FXE,
*(Geometry theoren need not
be quoted when used.)
Section B
9. x, y and k are three numbers. 16.
The sum of x and twice of y
equal to five times of k.
The sum of the square of y and the product of x and y is equal to four times the square of k.
8
Find Y, y in terms of
If x, y, k are all
positive, find the value
of such that x-y-4.
PQ. CD are parallel chords
of the circle, centre 0. TB TD are tangents. Prove that (a) T, B, D, Nare
concyclic,
(b) T, B. D, O are
concyclie,
(c) PNNG.
In the figure,
nge of deviation
40′ (Ans.)
2. As shown in the figure,
if the luminous object is. placed at the focus of the
lens, it will retrace its
path after reflection.
4(a)(1)
(Ans.)
If the length of the
wire is kept cona tant,
the
requency of the note
by the wire is
ortional to the square
root of the tension in the
rize.
150
18
√50
150/50
18
《立五》 王堂县立路. shorten by 10 cm then equation (1) becomes
f - JL - 10) 3
Hence,
(3)
(2)
T
(3)
-10) f
L-30
original length of 30cm (Ans.)
Original length of B is
20cm
250(Hz)
fa
250Hz
30 × 号
the frequency
(Las...)