1978-01-19 — Page 19

§報週育教頁三第張五第二日一十月二十年巳丁服夏 WAH "KIU YAT PO

教僑華

地理(十六)·李婉儀

GEOGRAPITY ( 16 ) Suggested answers to question

28.

a. The ferm ef natural: diana- ter described in the paragraph is landslide.

b. Landslides are very common in Hong Kong espesially in the

The rainy summer months,

factors responsible for their accurrence are:

Types of rocks Granite is a common rock in Hong Kong and it is easily subjected to weathering, e- pecially under the mwiat and

warm climate which encourages

which active weathering. Thiek.

-layers of weathered materials are usually found on alopes,

·have. The weathered mantle may i

of 200 feet. These depth. loosened materials are very likely to slide down. s teep slopea whenever here is a change in the environmental. factors, e.g. heavy rainfall removal of support or weight added above. In some cases, ländslides take place where the more resistant volcanic recks" averlying weathered ganite. In these cases, land- ilizes happen by undercutting, i.e. the weathered granite is removed first, leaving the volcanic rock to slump down,

** 2) Climate

The uneven distributiam

of rainfall is also an import- From ibuting Tacter. Sept er, Hong Kong

tationary

bring

The

tin-

inte; the ground as a lubricant or the cohesivencas of

All these render, the unstable. Moreover, the rainwater may add weight to the slope and make the whole mass become mere SUS deptible to downslape, movement.

3) Structural Condition

- The hilly sature of Hong Kong is also a favourable factor. The abundance of

steep slopes provides an ideal

condition fo the occurrence

「紅」外,又兼任「醫家主席」——雙書裝出生在其年害的上致府一美小说,大致上

長吃四個創要剪覶消耗減少,若油入口降低·美國利率將會雅表

防止通貨膨區劃,及保持低利转

·在莫斯科方面,搭訴速現的個人模力控已亲因,除了腻表共黨書 突

Vegetation Gover

基在;頒斯年

塞·网购的

Since it has been

believed that vegetation can provide a protection cover, the scarcity of a binding

vegetation cover is considered za a contributing factor,

However, it must be:

that the cozcept haa

been changed. It is argued

that well-vegetated sloped are

mere susceptible to landslides

for the following reasons: 1. vegetation helps to

accumulate more weathered materiala on the #lape

⠀ and weight is added.

ii. vegetation helps to re-

tain more water and thus quickens the rate and deepen the depth of weathering.

iii, warnings are not easily

detected.

There are statistical data support the above argument,

For example, the landslides occurred in 1972 were mainly found on the well-vegetated,

·alopes.

5) Human Activities Due to the rapid increase *** and the limited of population supply of flat land, high, buildings have been constructed on hill-slopes. It is already accepted that the existing natural hillside slopes, where made up of colluvial material are" in a state of limiting equilibrium, since they are not the final slopes of these hillsides. Excavation or cutting of these slopes auto- matically increases the alepe angle and this increases the risk of lande lips.

。强要的偏理九好交列者

而色

c. Preventive Measures

In an attempt to prevent landslides the following ways are suggested s

1) The Government should limit intensive development of those mid-level areas where the "soil is of colluvial origin and the hillside alopén are in excess of 36

2) ) The laying of a layer of “Chuzam3 plaster er coment un the suface of cutting is also effective in preventing large quantity of water form seeping into the alepe.

3) Surface drainage channels or conduits can be constructed to drain the water on the

In all. ground aunceptible. to settlement or soil creep, water service mains particu- larly these carrying water

under high pressure, should be constructed of materials which are not of a brittle nature and thus particularly liable

to fracture arising from differ- ential movement of the

As some light preliminary movements probably take place before the rook mass breaks loose, suspected slopes should

特而九部的的去高行

新機新七不然縮明動

1初强年抗的焼

在排業的開奏對推都

長約與以不然系蘇而名

報日僑

Both be detected oftenly. the Resettlement Department and the Public works Departi ment should continue to acti on complaints about possible dangers in existing. aquatter. areas. In addition, regular inspections of these areas should be made by experienced amgineera te watch out for: possible danger spets and to take action when necessary to alleviate such danger.

6) More careful survey should be done before cons- "truction. fke Government should immediately review its current land policy with a view te decentralizing the urban areas and utilizing some of the flat land in the New Territories for this purpeae. This is to be preferred to further exploit- ation of hilly terrain invel- ving large scale cuttings and excavations.

REVISIONAL QUESTION;

30%

Below is a photograph taken -on Cheung Chau Island, Hong

Kong. The features shown: on the phote resemble a certain landscape found in limestone area.

a, Name the type of landscape that is found in limestone area and explain ita. formation..

Om what type of rock do you think features of similar. appearance may develop in

Give a reasoned Hong Kong. account of t

生物 (十六)·梁永華·

BIOLOGY (16)

Unit 8: Reproduction and

Development

TI Conventional questions:: 1. The following diagram showe

the egg of a bird.

b.

四期星:

M

N

日九十月一年八七九一层公年七十六國民警中

What 18X? What 11 be

developed from it to spread over the structurea Yand N during the early incubation? What types of food are stored Pin (1) Y and (2) 07

c. Name the following structures. Explain why they are important ̇for the egg to adapt the teve

restrial habitat.

(1) M (2) N (3) 0.

d. state three advantages of

internal fertilization. Ans:

a. Germinal disc, the developing

embryo.me

During early incubation, atructure X grows and developa a network of capillaries which spread over the structure Y and extend onto structure N. b. T: Protein and fat.

0: Protein and water.

口

Naze Shell

N

Shell

| Adaptation:

Reduces water. Loeaf providea protection Vascularized

membranes and closely

attached, to the shell for gase- Qua exchange Provides food and sufficient water

Albumen ·

d. Three advantages of internal

fertilization:

(1) The chance of auccessful

fertilization is increased (2) Less wastage of gamates. (3) It enables the terrestrial organisms to carry out sexual reproduction with- out depending on the presence of water.

The following diagram showe a human foetus in the uteru

Placenta

foetus

2. Name the fluid which occupies.

space X.

b. Explain the importance of thde

fluid to the foetue.

Explain why the foetus dose not being "drowned" in such condition...

de Describe briefly the functions of the placenta in mamma18. Explain how the young mammal is cared by its parent after birth.

Ansa Amniotic fluid.

b. 1.To serve as a water cushion:

for protecting the foetus against shock.

2.To provide buoyance and

allow the foetus. to moveabout. 3.To maintain a suitable tem- perature around the foetus. 4.To lubricate the passage

for the foetus during birth.

c. The foetus does not respire by

the lung. The umbilical cord. bringe oxygenated blood from the placenta to the foetus.

so that it does not being. "drowned".

d. 1.The blood systems of mother and foetus are seperated by

保売國臂起

的最負特秘人國在

罪近實務密去往

thin membranes in the placen~

· 美國近俄諜案引起全民疑慮

保安負驚人。另一人是一名當有醫生的兒子。

·近,美國法庭又到克三名美國人當時

去局特務的豆子,他後來成爲一案共護贝迪廠的

第一三七三期

鳳 華

報 橋

年漢人別告

全安較總策政置慎守保

网量,人官由邦暴奋

人作爲間集留在美國·也心中無數。

級公民,使他們要成蘇發福味。

作異於調間

戰以來的任何時候。」 上一蛋聆说遊行的低霍影期,超過第二次世界大

·海員可以在美國內地的港口上岸渡,因此,蘇

由於旅行限制的放寬,加上蘇聯及其集團的

諜報榮岸。

上

公便分在西方国們本的富贵

切特行五卷

ta so that exchange of `gases,

nutrients and metabolic

waates can take place by simple diffusion.

Y 2.The placenta seperates the

maternal blood and the. embryonic blood so that i) the harmful effect of the high pressure of mater- nal blood on the delicate embryonic blood vessels can be prevented, and ii) the entrance of harmful substances from the mater nal blood can be prevented. 3.Some hormones are secreted

from the placenta to main- tain the reproductive tract. in a pregnant state.

e. 1. Young mammals are fed with

milk seorated from the

·mammary glands of the mother 2. Young mammals are veducatedr

until they become independent. 3. An experiment on germination is set up as shown below.

A

dry cotton wool

kept in a

warm place

bean -seed

moist

catton woo2. kept in

a refrigerato

X: pyrogallól solution. a. What is the purpose of using.

pyrogallol solution in tube B2 b. In which tube(s) will germi-

nation occur after severaldays? c. What is the conclusion from

the results of this experiment- d. Explain wiy. these conditions

are necessary.

e. The following table shows

the affect of substance y on the germination and growth of bean seeds.

gm of Y in 1000

Germi-(Beedling growth | nation after 3. days(mm nl dvator (95) | Shoot

92

Root

0.001

93

17 may 20

0,010

93

29

45x

0.100

89%99

20

$1,000 67

5.Man 8

1) In the natural condition,☺

how many percent of bean Ans: needs could not germinate:

fi)What are the effects of Y

on bean seeda? sa

a. To absorb oxygen in the tube.

Tube C

Bean seeds require water, oxygen and warmth for their germination..

d. Water is used to soften the seed coat, activate the en-

·aymes which digest the stored. food and serve as a medium for chemical reactiona. Oxygen ia used for the oxi- dation of food.sym

Warmth is required for the. enzymes to work efficiently. e. In the natural condition, i) 8% of bean seed could not

germinate.

ii)The effects are:

1. A low concentration of Y

(0.001-0.010 g/1) stimu-şi lates the growth of shoot. A high concentration of I (0.100-1,000 g/1-) inhibits the growth of shoot and root as well as germina- tion of bean seeds..

唐段人员?

東歐集團闖東多於英國反叫

the

蘇加 嫌防 吳

三指財閒大家燃機.

表

蹰業力派活 樂團

日本防潮寒亦港告,頂飂季遼東海軍的發展速度比雅湖中建德··

——世界各國均受嚴重威脅1

·朗、加拿大等风虒点無開活動

: 專家指出:蘇聯的開業,可能以外交人員的身份作掩護、也可以科學家、工廠經理、留學生

蘇聯間諜活動更加猖獗

[上开

·對整個世界而言,一九七七年是相第

*析現勢 - 認爲自炫碑結束迄今,一九七七是最爲穩定的一年。

有問及強魔光伊重波七

世

5。訂。的北人年在宮。樂認您有家

饭石到改變

界動人的秘 界特將·扬韶者阔言入意弱原密而人輕人。貴些密·在牙 八達的開壁的解現項界命活盎食人世不。 舊時機會

○經表治項 九酵豆棄魅力农物ㄋ 上足一家 于暴街食一的 食美十七次全票味,要十可文的界 專帶上

暂无反名的由意

需加豹于研一。然合多位家軍船向·核樂家必下 飛機 立了 原解 相東 因民S 深要够不怕液 氣真。藏們內縣內富罰。 張工仔,救避 稍决信工為。改潮更而發提中

、嚙受百需熊食料 須服务计

配人開正解对優二國所目不,意人,比稱五加及 钵對 闵床内。 其一特辦不己助,都可 家慢

*研。中曲將此世生去餓極域。齒機

地有、商學變很

未用這地有,兼計在本

【找 窿速計糖

持拉。生使口機

之它罩它石 S

事雄受務折,同時美國亦退居次要地位,但事實上英國的影响力丼益下降;除去鎮壓轻。 一九七七年初,英國在美國支持之下,提出一項加快羅德西距問題的 爲首的官僚之漸漸掌握中共的大辘。在年初,他們的政權並不穩固。 卡特總統就中期間的解决,自有他的一套。觀察家認爲以埃高峯會仍有必然的無篩。他們在激進派發炸影响力的若干省份,曾勤兵了大批事 生技部,打国·九七七年最前大的事件是由那水平與 : 九七六年十月,他們逮捕了激進派的對手「四人幣」,選一九七七年初,

重檢去年世界大勢

國際關係大致未改

兜而花

美蘇均忙於內政不敢重大冒險

一在内。英國能重覆一個環定的森黃且使类先穩定嗎?這個問題與卡特及融

【旬通過一以節省能還方案。

都非常開機速貨展。我 界的貿易在内,一 括共向市集內部及它外 供的是贸易費钝-包 一九七七年四

鑒的,還了

强民理系的溫 英止,

·西方盟解的繁典及治療對各國仇易生的不良使果選比對羅聲

更已獲得被治上的影响力。

曹依赖其兵力!以聲捕它在運用说要,核力政治失里草

大

外放年

暴它之话!

仁

慈控齡

我之

·及與四散候家之間的畅保,這一年來

上

題源食口

及主

用秘光月 取案四有 搭實當初 工件機多是

龑估蕸<

觀悲過太必未途前戰特点

活力再計究較

我断只:

大幅幹撑所因素如中在五: 多警悲但雖冪」

·專家對估世界石油

外表在外。

交上對交

涉

所名位女 名家

可界坡: 摑加食制的定在養。的多分以虫。赖是生

期但不時配及 衛週貪一些

了政治原因, 保持强

只售英二元七角閃 體的變化。當油禛供需 的石油供健囊!媾和油

貴和不經濟,但在当时

的十二元五角一的

低映出的及、镇放 禁一存的資計很和制殺培,但定

政丼

小宮

於的持 風事 音礙生生勢。