1971-11-14 — Page 15

REFERE

「育教僑華買三第張四第 日七廿月九年亥辛藩夏 WAH KIU YAT PO

報日橋

14 NOY1971

CITY HALE

日期星日四十月一十年一七九一曆公年十六國民華中

1972

育敎僑華

中文中學會考試題預習專欄

生物科(二)

7变形蟲草價蟲雖然是單細胞動物,但也和我們

人類具有下列4命現象是相同的,

̇梁景植

1972英文中學會考試題預習專欄

温習内容1安田修整必ず習性

上期習題答案

堅道英文書院主編

經濟及公共事務科

(二)

(二)習題

1下图為变形蟲的形態图回答下列問題

布生賀具面張力仗表面積減縮主最小設屹淋 離之原生質塊使王園或扁圖球形

SCONOMIC AND PUBLIC AFFAIRS

QUESTION

ANSWER T

部有何功能

What do you understand by elastica ty and inelasticity of demand? What are the factors affecting etablicity us demand? Mention one... cómmodity that had an elastic demand and another thà, bas an inelastic demand, and lustily your choice of common ties;

(3) Z部對变形蟲的生活有何意義

The extent to which the price of a commodity can affect the quantity of the common tỷ to demanded is known as the elasticity and inelast 1pa ty of demand.

Demand 13 Band to

however alight it may

causes

Tea

in the quantity of the commoity to je démarc ad graphically illustrated below

QUANTITY

BLASTIC DEMAND

2下图為草履蟲的出题图,回答下列問題

山請將下列部分填入图中適當位置和

例a大核

小核

(伸縮胞 d輻射管:e刺絲胞干食物脂 大核与小核的功能有何不同

(3)食物胞消化食物的過程如何

你能在怎麼樣的環境裡,找尋到这两种微生物

4.变形蟲,草履蟲,均無呼吸器及排泄器,則這些微生

物怎樣行呼吸和排泄

ś何謂嘗試成功?試以草履蟲的行動以說明之

a细胞壁液胞 细胞核 小綠質佳 細胞質 f細胞間哭

主司细胞华一动生理代谢功能之控制

(3)上图為植物细胞,因為從上图中可見到下列四只 均為植物细胞所具有的特徵,有顯著的太液肥, 胞核偏於一側,有豐厚之纖维素细胞壁,具有含章:

綠素之質件一 一絲質佳

a紡錘絲

茗染色紐

色体

大星絲

中心小都 順序為:(D)→(A)→(C)→(B)

(3)上图為動物细胞之有絲分裂,從上述分裂序图,可查 到下列两项現象,均符合動物细胞分裂之特奌

(1)前期,在細胞核附近育中心体及苦絲之击現,

般植物細胞所缺乏者

末期,細胞中央部分的胞膜收絶終桴细胞分裂 二和植物细胞分裂至末期時則由紡絲嗄 聚於赤道面上形成液腫其指在腰两侧分别考q 新细胞壁

原生質為一種冷至

的膠狀体,為構成細 胞核细胞質及细胞内一切發生生命現象物件之物質! 英國生物學者:赫胥黎称原生質為生命之物質基礎。 代謝作用、生物体一方面進行異化作用分解体質而骏趣 能维持生命活動,而另一方面自外界攝取物質,經同化 作用組成体質補-

損耗,這種新舊買之替換与及 物質与能量的变換作用和為新陳代谢作用

PRICE

ǝ change

Lee, howeve

change ac 10" juab tuty of cos commodity that ve decanded, aphically illustrated belowit

試比較变形運動与川流運動有何不同

單醣

葡萄糖易溶於水中。

Can Han

麥芽糖、易溶於水中

(CHO)澱粉

溶於水甜味

QUANTITY

vumerous ratiore aré, rés ponsa

whether demand is elastic or foelastics

Commodz ties which have close substitutes nave lastro demand, because when one commodity misse price..

consumers will start to buy the other commʊda t les instead. Butter and margarine are, commodities that have an elastic demand since both af

The next factor is the degree or a consumer s

abit. If a consumer nas, formed a strong habit for

ɔne particular commodity. (especially when the commual

凸

açamodi ty 18 inelastic. If a person was formed a babi

ual liking for cigarettes, it generally follows Coat

119 demand for cigarettes 1. inelastic since he cannot find another close substitute for Cikarettes

La commodity is one which 19 necessarly needeu. ay.consumers and this commodity dose not have tate, the demand for 15 10 invariably inelastic

which there la a necessity for a commodi will decide whether demand is elastic or anelas trot,

me to

The income of a consumer also plays an influencip -role in deciding whether his demand for a commoda ty-is

elastic or inelastic. The nigner a person a

the more inelastic is his demand, for whether Loe price rises or falls ne tends to buy almost the same quan vi sy each time. However, a poor person will buy more when the price drops and buye lesa or nothing when the Dr Lou

The final factor that can affect the elasticity of demand ie whether the amount spent on a commodi c amall or a large percentage of a consumers total expens iture.

e. For instance, the amount of money one, Špenas un Sugar must be very little compared wiLD money other commodities as a whole, so that nowever great tas change in the price of sugar is, this change, or "price" does not affect the quantity of sugar to be demanded. Thue the demand for sugar is inelastic. But, the demano for motor-care is elastic, since the amount of money spont on them forms an enormous part of a person's total expenditure....

We e ay that culine hay a la vic demand, pecatas If the price of coffee rises consumers wail bay tea.

beverages and are ty

cocoa" instead me they are' close substitutes,

say: pleasure boate have an inelastic demand. because the buying of them takes up a large war, ut, the consumers' total expenditure.

are expensive, fewer people will buy, but when they are cheap, more people will buy

QUESTION. (4) What do you understand by interrelated

demand? Into how many kinds can interru lated demand fall?. Give examples

ANSWER 1

ther commoditya pula

then, the demand for two dissimilar commos 188 is linked together, so that an increase in the demand for one wilt cause a eumilar increase or adropbo

1's known as. interrelated demandin

Inter-related demand can fell into four different Kзnas competitive demand, derived demand, joint deband and composite demand.

Demand le bald to be competitive li ine demanu for one commodity drops in response to a rise in the demand for another commodity.^. Competitive demand occuri when articles are close erbati tutes for each other. Take butter and margarine for lastance. 1 7380, 19, lue demand for one wall: cause a drop apine demand for. another

Derived demand occurs when a change in the denand ios one combody ty, produces a change in the demand for another Record-players and gramophoné records, dra examples of articles that have derived demand because,

the price of record-playere: rises, there wild drop in the demand for gramophone records

By joint demand 18 Deant that a change in zemand for one "commodity will also produce change an the demand for another commoarty,

the dagawa for motor-cars would dean more petrol, and fewer, mot care,Jean petrol..

When a commodity can be used for more than one purpose, the demand for it 18 said to be composite, Since if there is a rise in the demand for it for one purpose, the aupply of the commodity for other purpose绪 11 fall For instance, timber can be used for makin paper or producing furai ture. If more timber is used. for making paper there will be a drop in the supply of timber for producing furniture, so that the price of furniture will rise.

Timber la therefore said to have

* 000002i te "demanda

Page 15Page 16