问题 读图填空题

下图为物质出入细胞膜的示意图,请据图回答下列问题。

(1)A代表_______分子,B代表________,D代表__________。

(2)细胞膜从功能上来说,它是一层____膜。

(3)动物细胞吸水膨胀时B的厚度变小,这说明B具有__________________。

(4)在a~e五种过程中,代表被动运输的是___________。

(5)可能代表氧气转运过程的是图中编号_____;葡萄糖从肠腔进入小肠上皮细胞的过程是图中编号____。

答案

(1)蛋白质   磷脂双分子层   多糖

(2)选择透过性

(3)一定的流动性

(4)b、c、d

(5)b    a

多项选择题
阅读理解

阅读理解

     Children always appreciate small gifts of money. Father, of course, provide a regular supply of

pocket-money, but uncles and aunts are always a source of extra income. With some children, small

sums _go a long way. If sixpences are not exchanged for sweets, they rattle for months inside the money-

box. Only very thrifty children manage to fill up a money-box. For most of them, sixpence is a small price

to pay for a satisfying bar of chocolate.

      My nephew, George, has a money-box but it is always empty. Very few of the sixpences I have given to him found their way there. I gave him sixpence yesterday and advised him to save it. Instead, he bought himself sixpence worth of trouble. On his way to the sweet shop, he dropped his sixpence and it rolled

along the pavement and then disappeared down a drain. George took off his jacket, rolled up his sleeves

and pushed his right arm through the drain cover. However, he couldn't find his sixpence anywhere, and

what's more, he couldn't get his arm out. A crowd of people gathered round him and a lady rubbed his arm with soap and butter, but George was firmly stuck. The fire-brigade was called and two firemen freed

George using a special of greese . George was not too upset by his sixpence because the lady who owns

the sweet shop heard about his trouble and rewarded him with a large box of chocolate.

1. According to the passage, children often get pocket-money from their_______.

A.  fathers    

B.  mothers      

C.  uncles    

D.  aunts

2. The underlined word "go" in the first paragraph probably means_________.

A.  move      

B.  last          

C.  be placed  

D.  work

3. Which of the following statements is TRUE?

A. Fathers seldom give pocket-money to their children.

B. Most children can fill up their money-boxes.

C. George bought a large box of chocolate using the money given by the author.

D. George didn't feel sorry for his bad experience.

4. The best title of the passage should be ______.

A.  Save your money    

B.  George's bad experience

C.  Sixpence worth of trouble      

D.  Pocket-money