1979-02-13 — Page 18

二期星

日三十月二年九七九一愿公年八十六國民華中眘救濟經

上午9(四)

五,最低一四〇五

抬哄友好盆無圍外

港金

十升反|市|港 元近覆價金

四六元五去息元六一四一市收

跌鈔美升幣英日德

馬克日圓上升。.. 日邈一例無外圍行業絕盤。 於上五、六金價均告下

收市價酸姚市升九元五角, 金牌價無變 - 美元持穩,英舫

港金市戰爲年握,好友哄抬。 八韓ㄩ昨(十)日本

由

◎裝個伊朗局勢相信亦用

树下 承接有力,金價走勢就罩略升 立磴段,伊朗內已基本夲息 金商稱:由於伊朗軍採中

·好因素支持,好友仍案金市

英,日本港金市張無熱的外

場市匯外洲歐

升銳價金黃

跌下匯元美

relled in the indicated

direction, what is the

direction of the induced

current in each case

【特訊)鎣敦十二

丹吡:星期一,伊朗的

際。亦將動金價有影响。金價於去還來雖告下跌,但現時仍處於較高的水一方美飾。倫敦金的升

反通版攢麓公佈,潜施是否實 而 - 上週會盛傳卡時本週一有好友士報二二四七, 台山 石油供最有謂大影响力。另方 當局際政局不安時投資 儿 伊朗爲世界第二大衡油, 往常的性 「五美元,上升了六

·者便湧解資金,蘇黎世

【開市塲受到影响。不過,仍網 悠美元開市價下跌,低

勞賬具稀士脫師,開市

能市收市價高一元五角 六元五角,公慣定一四中,挺百馬克兌二六五 價報四〇六.○,鹼 -激隔 ·吉克·西第四九美元。 四〇五 便民國實在先,五·最低一個末跌一角,每英鎊兌穿锤安士升了六美雅而

钻

世由一,大六OO跌至

由一。八四四五跌至。 ,八三七。馬克。除

·法蘭克福美元附

日合纘原料四月起加價

TREBOK (O 市倒升九元五角,全日-台九七〇港元,較上10港元,升5元半

稍镘跌落一EC二 〇四百七十元,沥白金價八〇〇港元,较上圆 市價高八元,酸亂市收一。收市憫百美元兗四萬日鈾見二四一三 1-O收市,較上午開,穆,哭姊馬克5國上升0港元,升一元五角

午開市一四〇六・〇 動,饰黄金價再神一千一方面,百美鈔兌四七一耎覺。 【七。五,最後以一四」外雅方面,美元持,每百馬克兒二五九十五 ,空升上一四○七,五,每阿並二千五百四十元。末跌三角,每英銬免九

阿萬圓第二四六〇開市時由二.000 角四仙,無現貨交收。 10.0,低息至元六莞,升一元,市坚定投至至·英皆 昨颔金純僻無漪;五港元,升一元。現鈔 升至二〇一三

·五三港元,升仙,

,阿斯斯特丹美元的, 四二三二五法郎

大士來 一,九九五〇跌至一。九

·巴黎由四-KOO

一

O罐貨

resistance of the 2V cell

E is negligible.

報日僑

七五荷蘭盾,布魯塞

「

二九,五七五至

法郎米陽由八三 一九四七五比劉時

八

·雅雙料决定由四月起, 張的影响,日本合成及其國內價格, -對東离哦你出爾袼提高,二甲基宏甲酸價格供存。近年來,日本合 價格上升奥供應轉呈棄一提亮,不久之後媯將波於合成漼原料用斑很 低。因此, 輸出價格的一粒原料加工亦很多,由 瘺由於石油 用於紡織外旅行用品需用亦多 港加工成本將影响增加 現在PIA原料的,旅行用品需用亦不少 廣,除了用於裼徽

-二〇跌至

東京外西市路因週

一公栄股,故休業

國內的價格公斤將要 一百八十美元。本港守,以後提高到將近一百一,其先是B因升值的影

診

松大粉現先料 年行除成

高兩定減價 日

足越 月1

二第消尙

定四月以後摄高檢往東 日本各合戤原料應商决一百五十塊左右。繁的刺激。本港有關合 城東京統仪報告: 張二于且而成綫每公展,在又大藏提高,還是 有

WAH KIU YAT PO

百七十菜一百八十美元 元。EG斑瀬將提高一 其元,後米離闢六百樂 格,前者何做五百五十 使上述兩組合棘原料價 頓將近提高一百美元,

●握台張堀相當大,例如 PTANDMT價格年 只係食統上升。單翕今一根洁米廿六欸,其中 原料的梁出價格,目前

韩每一百廿三院 台米商一家,玉覆新香米毎包一百卅 一元,脊鸯花新米每挝 姚洪宇新林苻母良一百,

·成盤紀錄:國金一百卅一派,美國油 一十八元,牛研香米毎

米市交投大勢平慢

拆商清理候寄選擇補給

門市售米實銷稍後方能復增

《特)昨(十二卷補-

。

頁二第張五第日七十月正年未己麽夏

一百一十三元,才学汝

日本英梨人士致示

價格說劓比去年米售四百三十包 、 大陸| 米佔二千小包。 波米業人士提出: 月十二月的價格、米佔二千五官中包,對仔米镲挺一百一十五元 老烁上升四十至八十美,八元,否蛋白夜铵九 國米佔二十小包,澳州,黑糯米每一百計 年一月三月的晚出十八致有成飛的,泰國百十元金發財街 世六元,林字糕菌海报

*..

元

燕南粘匠憕一百一十六 粘每一百。上元、新

无,紅火車碌(九

珠米担一百元

百〇二元,糯米粗很

- 木字椽苗链枏「百 五元,由字油粘感困 一百廿八元,澳洲

藝的主因,傑出於照 害理悷舒米,愛米實-藍金覽俗米(老) 被所激。由於政治將易 商開盤批洁,只作葵翠莉香三號米标樵一百一十 的能需緊迫类二甲苯館後方能復,大米 每一百一十元, i 合暾原鄉出價格搨爭德二、三盤商要畦紙龍出貨〕藤短八十七

因此,日本各然會 十一是乎在市爆絕跡。但

而客平價 岛升,現

7我快要急速增加,因 月一了提到油的辛烷伯而

二年也因爲美國

观的以油反而供給不足

未做不安的伊朗停止生 一條石油,使得照供給過

二甲苯·

MT價格來吸收。 ...

【行 南產出的PTAND

第一甲苯渉價的部分對某

出價:比青龍,

4 其內開價格將較痛

8.05

想和

H.K $12.43

12.57

4,25

4.275

3.08

國際股市金融行情

(一九七九年二月十日當地時間)

倫敦股市《金融時報指數: A2:40 (448.30)

午市 5.60 (445.10)

五種主要股價(質及註)

H.KS 18:26, 10:18.34 HK$8.00

FOR

H.K.$ #99 H.KS 2.92

•紐約收市(蕸環斯工業指數)

開市指數2.34(819,99)

東京投市C道瓊斯綜合指數):

收市指數

倫敦金市(链盎斯)

FREE US † 2,35 (249,60)

比蝶U'S,11506244125)-20 美元開市價格:法蘭克福,8870 馬克

偷软 東京 巴黎

2,0130美元 放假日记 4.23259

百人新洫担百大

1979

中學會考試題預習專欄

數

學

明德出版社文是波提供資料

trai

10. A train, running between

A

two towns, is 3min late if

頁五息有

留敬張刊經

意希第在濟

CDE to area of quadrant

your answer

and is a minutes late if it 16. f the ERA

it averages 45km an hour,

averages 40km an hour. Find

the distance between the

towas in km and the prope

time for the journey in minutes.

11. To the figure

eurd.

Mathematics 19

Exercise 94

Answer. ell questions.in:

Section A and any six

questions in Section B.

Section A.

Prøve that /24/5 is = rest

of x +1=10x2.

2. Simplify

1+g{b*c)=log(be)

3. In the figure,

LACB is a right angle and D

is the

2

-point of BC. Find

ABAD in terms of BD.

(Geometry theorem need not be quoted when used)

4. In the figure,

Ris the orthocentre of the acute angled AABC, Prove that

(a)/PDFI+/RAC-90°

AD

If k is the circum centre of AAFE, D,

É are concyelic.

the figure

BE, CF are concurr 0. Prove that

AAOB BD

AAOC DE

square EFGH inscribed in rhombus ABCD AB-10cm

[ABC=60®- Pind the area si

square EFGH;

The aides of the aquare

are parallel to AC®BD.]

物理

(十九)

明德出版社 榮家提供資料

PHYSICS (19)

Exercise Ten

Magnetism, Electricity

and Atemic Physics

1.(a) Figure 1 shows the

potentiometer used

measure the e,m.

unknown cell E.AB

wire of length 1m.

a sensitive central zer

galvanometer and the

of the driver cell is 2V

driver cell

(a) Find the: petential differe

ence across BD

(b) If B and D are joined by

capper wire, which

does the current flow ?

Why ?.

() If the 722 resistance is replaced by a resistance of Rehns, find the

resistance R such that

galvanometer shows ne deflection when it is

connected across BD,

3(a) à transformer steps

down. from 240v te 12V with

1200 turns on the primary (5) Find the number.ef:

turns on the secondary (11) If the efficiency of

the transformer is 80% and the current taken from the secondary is 11, find the current takem/from the

240V supply.

Figure 5

Fi

(d) Figure 7 and figure */ show a copper red AB is placed on two metal reds and current in flaving. each of the cases,

what the direction of metien the rod AB in each case

AT, BP are the tangent the circle. POT is a straight line. 11 [OTA=35′′ and */BOT-115 find BPO. (Geone try theorem need net be quoted when used) 5.10% of a man's income in

taken in tax, and 20% of the remainder in saved. This leaves hín 8450 te spend, How much is his income?

6. A merchant mixes 5 grades.

of tea costing respectively $19 per kg, $22 per kg, $25 per kg in the ratio 3:4:5, and soils the nixture at $30- per kg. Find his gain per cent?

If 16ces 0+Jain 8×7, find

Regular 10-sided polygon are inscribed in a circle of radius 10cm, Express the area as percentage of the area of the circle.

Section B.

9. A stone is thrown up se

that its height above the ground after t seconds is (88t-16t2) )feet.

(a) Find the length of time before the stone strikes the ground.

5) Does the stone reach #. height of 125feet above. the ground?:

(c) Pind, cerrect to U.isec.

after what times it i 100feet above thë

BD CE AR

(b)噐·湯

EA

13. In one year a dealer found. that on every $100 of goods sold he made a gross profit of $40 and, after deducing trade, expenses, a net prefit of $18. In the next year he handled 50% more gooda, but the price at which: he bought thea had risen 80% and his other trade expenses had doubled If he increased the price nt which he sold the reeds by :70%, , find the increase or decrease per cent

his gross profit

(B) hip net profit.

. A cube has an edge of 2cm.

triangle in formed by joining the centre of one face of the cube to the ends et one of the edges of the opposite face. Find the area and the perimeter of this triangle.

15. In the figure,

circle CDF is inscribed in the quadrant A0B, radius 10 cs. Find

(a) radius of circle CDE

Figure 1.

(1) The galvansmeter ra when the reads zero

contact X is 0.75m from Ap

what is the e.m.f. of 5 7 (ii) If the 2V driver cell

has an internal resistance

of 1 ohm and wire AB has a

resistance of ¦ shar, where

is the balance point when

2-ohm resistance is

in series with the 27.

battery 7

placed

(b) Practically, it is easy to damage the galvanometer

by large current if contact.

I is made on the vire AB far

from the balance point. With the aid of diugrams, suggest

methed te prevent fram dəmaging the golvanometer,

(c) With the aid of diagrams explain how a potentiometer

can be used to compare the

ells

(b) ratis of area of circle 2. In figure 2, the internal

(b)

Figure 3.

copper

Figure 4

Figure 3 and figure 4 show twe copper rods lying in horizontal plame. Electric

current is flowing in each

og the cases. What will

happen in both cases, (c) Figure 5 and figure

showsa copper, rod AÐ is

Figure

radi@active element examined by means of G-M tabe connected to penlar. The count rate rate drops from 8000 per winute to 1000 per minute in 6 minutes.

(a) What is the half-life

radi

period

active element ?

(b) When will the count rate drop to 250 per minute?