1966-04-07 — Page 15

廣三東張西

日七十月三年半芮接受

華僑教育

英中会考

試題預習專欄

一九六六年

中中考試題預習專欄】

生物科

(十四)

徐錫禮·

BICLOGY

物理科

(十四)

.

藝浠明。

Exercise 14

第四篇: 光學

Answers to last" exercises] Į

甲部

而成之像称為实像进方向而

实物之方向常

為虚像其方向与实物之方向常

2球面鏡之物距為像距之两倍時所生之像必

|

3.有A.BC三种介值,若B介值对A介筷之折艇

i

介质对3个镇之折射率為

4人眼在綱膜上所成之像為

像

5两凸透镜或凹透鏡同軸接触所成旗透 鏡之焦距:必 其中任一 ·透鏡工焦距。 6.在七色中国玻璃对紫色之那射率

三棱鏡後其偏向

7.42€ 1.

漫色彩。

故鳋

的

可調配成

8.因声波之波長較光波之波長為

则:

於黃現。

9光源在各方向所者總光量&流明數目,等於

光源燭光数之

10看了灯光出了万H呎處之照度為工呎燭時,则

事业水平距离為了呎處之照度為,

1. 若晴诛ż焦距

,以致竹成之

像在網膜之一,即為近視眼应戴

所製成之眼鏡.若睛诛之焦距 二或眼軸

以致所成之像在绸膜之一,即向為

应戴

.所製成之眼镜.

2者将透鏡放於水中其焦距必校在吉瓦中

為

3有一天文望遠鏡,若其物镜之焦距項目镜之焦士

·恰胄合時其末傢必現於

14. 就填-

下表

像之性價

位置

虛實

鏡焦奌间

鏡

主镜力焦美间

焦桌上

焦奌2倍焦距间

1. What is digestion and why is it necessary? Explain, as far as you can, how the salivary glands, the stomach and the pancreas help in

Marton L digestion of food in

Digestion is the procesa of intake of food and preparing it for absorption and assimilation through the blood stream from the vill of the intestine in animals or through the water-conducting and food- conducting systems of the plants.

• As in animals, food is taken in to supply materials for growth and maintenance, for replacement or repair of parts, for energy to move, and for producing sex cells.

Plants synthesize the materials they need for life and growtb from simple. chemical substances in the soil and air.

The food therefore must be subjected to physical and chemical enangea, called digestion, before it can be absorbed and used in the body •

The food in solution is then reduced from larger moleculas into smaller ones which can pass into the blood stream by diffusion through the] walls (mucosa) of the intestine and the capillaries in the animal body. Kuch of chemical work is dons later by the enzymes in the digestive track. of 'the animals.

unree pairs of salivary glands are situated in the mouth floor. They secrete a solution of mucin and ptyalin, The water will dissolve any soluble food, and together with the musin lubricales

The the food, helping its passage down the esophagua to the stomach, ptyalin digests the starch to soluble maltose. In many other animals, the saliva has little or no digestive, funétion.

The stomach is a storage organ ano muscular sac. The rhythmic contraction of the stomach will will cause the intake food to mix into paste form before passing into the duodenum. Normally liquid only enters into the stomach and pass-downwarde gradually without allowing to stay in the stomach while the solid food has to stay in the stomach for digestion. There are' enzymes and acid secrated here to help in digeation. The gastrid glands: will seorete hydrochloric acid, pedin and, in young animals renning

The hydrochloric acid acidifies the stomach, contente, stopping the aution of the ptyalin, but enabling the papain and rannin to functior The papain breaks down proteins to peptones and proteases. - The remmin bears the f responsibility to coagulate the milk, been in the stomach for some s time. the food Laat Body temperature, and the fats are melted. An ana

Havin

However, harmful substances and intake of food in excess may act

as irritants in the stomach causing a convulsive contriation which leads

to waiting a

~~The pancreas, situated in the first loop the duodenum

the bile duct into the duodenum, secreted enzymes in the pancreatic.

Juice into the duodenum which then can function,

山。中有優碼表現的學生們,此後的前途經車價的工作,他年度教育髮質葉及紅的,開始囊打基礎,使照著前往元朗媒前還村·洪來觀妙恩分,不失

畢

塞村客日師由蛋

全根英民感吸樂日臺在與生國

三節本网、到司第一的即英音際

的的的量感期上

骨

按時統

生活

<ERGENCÉSZEN

日七月四年六六九一膺公年五十五圈民奉中

The pancreatie, Juice contains lipase which digests, rasa to rapty

acids and glycerol, amylopsin which further digests starch to maltose)

trysinogen is a precursor of trypsin which breaks down the proteins into aminoma cdds.

The train is only formed when tryeinogen is mexed with enterokinase which is secreted by the walls of the duodenum.

The pancreaS

also searates horacne, insulin, which regulates the blood sugar in the blood.

All the food taken in is only absorbed in the lower part of the small intestine, the ileum.

2. What is circulation? And try to describe how the blood is circulated

through the heart and through the lungs.

Circulation means the movement of a fluid in a regular or eiranitous course in a animal body.

As in discussion of blood circulation, the cells in the blood especially the erythrocyles, red blood cells must be mentioned to help in explanation of mechanism of blood circulation through the heart and the lungs of a mamma).

The mammal has a double circulation, that is the erythrocytes have to pass the right auricle and right ventricle (one circulation) and left auricle and left ventricle of the neart (another circulation}, During one half of this cycle the arterial blood supplies the body tissues. with oxygen and returns to the right auricle of the heart as venous blood; during the second half the venous blood is re-oxygenated and returned to the left auricle.

The whole passage of this double circulation is as follows

The arterial blood (oxygenated blood) leaves the left ventricle via the aorte of the heart from which arterias, arterioles and capillaries are formed in succession one after the other. Lastly the latter (1.8. the capillaries) joins to form a sinus (a network of capillaries) from which the venous blood (deoxygenated blood) empty Into venules, veine and finally to venee cavuelve, vena cava anterior (superior) or vena cava porterior (inferior) which open into the right auricle. The venous blood then passes through the tricuspid valve into the right ventricle whence it is pumped into the lungs through the pulmonary artery. (The blood has passed through the heart once.} The pulmonary artery, which carries venous blood, branches to form capillaries in the lungs, and these rejoin to form pulmonary vein after the completion of gaseous exchange of the blood in the lungs. The blood, which is now arterial (oxygenated), passes through the pulmonary vein into the left auricle, and on through the mitral valve and the left ventricle into the aorta. (The blood has now passed through the heart twice to complete the circuit). Thus each blood cell passes through the lungs and body alternately.

The movement of blood circulated through the chambers of heart and lunga is entirely affected by the systole and diastole of the heart and lungs as the blood is pumped by the rhythmic contraction and relaxation of the cardiac muscles of the heart,

There are valves between the chambera of the heart whion regulate blood flow in a one-way direction.j

Exercise for this wmaica'

1. What is reproduction? And try to draw a fully-labelled diagram of

the reproductive organs of a female rabbit. What are the functions of the placenta and how is the young mauna) cared for by its parents both before and after birth?

2. Why is it necessary for the plants to disperse their fruits and seeds?

And try to distinguish a fruit from a seed,

在歐洲成英的有些只有戴十二人的地方 說,組織一個學校粜籴,甚舂加易事的事 ,這是事實。以被倦擁有四促藝人口來

上萬人,歷時三個,甚阱岩演奏會則由三月里。無可控营、营電車院是低音李京的 :結束了,參加的單位有六千個,學生逾三 潘塞爾基米音樂院,擁有五十部的位內米 使一掌青年人古頓會發展自己的興趣,其的。在此之音,我們必須有一祖所府 中我們萨現不少天才。本恩塔供節已逐,自然,衆內坐就永康程之一。 在巴黎发表 洁系统广大的音生重,節目多抛售,只有如此,一讓我無性的量技弗以才高

(寒組,越邦組、勃拉姆祖,讓死協琴曲租車,在泰森的激和合作無間。香港有成员的

· 競爭最激烈和受激爽的,莫如岩士唐 KELED FEGRIEZTEPE -

各評判官一致,接

·樂院。那麼,這裡什麽程創區?首先集

GILMORE JENKINSHE- MR.M PER及多人組成的,前往瞒至英國音樂 ARTINE MR. MARTIJN 000 DATION ERAKCJ-ZSIE

奥茨扇最伊秀的演出娩类。有一位,香港须有音樂昂院、

CALDUSTE GULBENKIAN POUN

的書

幣)

架星美人才,現有一些人主辦的小院,希望社會人士 你可暈出來,但缺少一個惠同臺,造就更多優秀高 教授指出:李湘音樂教育有偉大成就,從音樂

麻生因,無論在學校方面,嚴重力国,三

必會有更大的實說。」他利妙先生的

,燈梅伯,及榮會員道家典等共就 *店二樓成宙斯汗置单行本月分月台,都转身离院啊?如果有的話,除了教學之外, 总束的。我以猪他想深决道兰利环的,要 由羅兆鴻會長主持開會後,先報告的畫岛插于會午西會席上被梅伯水量「台港教育的屁 海上有議馬對現的學生,他們又將身上

,這所刚面世不久的音樂學院,正由一位的伽心態性,對於被實社會 私人創設盼予支持, 一定

+來本招學校音樂寫的中出成就—— 音樂教育問題籍,就會想起過去十八年 她梅伯茨授跳科如下:盛我們供及畫

-「香港音樂教育

趙梅伯在香島獅子會影

舍焦距外

凹镜 透镜前

冷博娛 换洗全興

在緻小學六年

價財事免費生活,

已知玻璃工折射率乃子水之折射率為号机来提示,其位置思如下面 Pom教」突_计弄時可将水四年半狸為“呎,凹面镜;四手半徑為10呎,一 一般编镜一个水中琦其兰距為其石亨丸中之名

折射及凹面鏡分别考慮.

技术可用下式以承其在水中反艺瓦中且距;比例

「人高5呎车站在鏡前3呎處(0) 用面解方法求出 (此人唱中所看利本身形仗(法此人眼睛在头顶下

4吋處)山用计算方法 求出此形状,大小及像 距也似值,

●凹面镜由李车狸為20吋,今有小果 不 水中南水年面7吋處浮游试用易养成计算不

有-哈哈镜 上部

【部為凹面镜! 形状各如下喘,此兩鏡蚰相距了吹凸面镜之

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