问题 实验题

(6分)下图为动、植物细胞结构示意图,请据图回答:

(1)植物细胞特有的,对细胞有保护和支持作用的结构是[    ]__________________。

(2)克隆羊“多莉”的出生与三只母羊有关,其中甲羊提供细胞核,乙羊提供去核卵细胞,丙羊是代孕母羊,那么“多莉”长得最像_______________羊,说明遗传信息储存在[  ]____中,该结构中容易被碱性染料染色的物质叫____,它由____和蛋白质组成。

(3)西瓜之所以甘甜可口,主要是因为[  ]_________________中含有大量的糖分。

答案

(1)①细胞壁(2)甲 细胞核 染色体  DNA(3)⑤液泡

题目分析:(1)细胞壁位于细胞的最外层,有保护和支持功能,是细胞的骨架,因此植物细胞能保持一定的形态,原因是[1]细胞壁的支持作用;

(2)细胞核内容易被碱性染料染成深色的物质叫做染色体,它由DNA和蛋白质两种物质组成,遗传信息在DNA上,一条染色体上包含一个DNA分子,一个DNA分子上包含有多个基因,基因是DNA上具有特定遗传信息的片段,细胞核控制着生物的发育和遗传,多莉长得最像提供细胞核的甲羊;

(3)西瓜之所以甘甜可口,主要是F液泡(填字母)中含有大量细胞液,内有糖分。

阅读理解
阅读理解。
Planning the Holiday
      Spain (西班牙) and Greece (希腊) are now more popular than France or Italy. Travel to the both places is 
cheaper in early summer. It is also cheaper to go there by plane than to go there by train, and it's easier to get a 
ticket in May than June, July and August.
      Most people think that Greece is prettier. Others say Spain is hotter and more expensive. Certainly hotels in 
Spain are more expensive than hotels in Greece, but also they are more comfortable (舒适的). Greece is much 
more interesting and it is far quieter than Spain. 
      Spain is nearer and one can get there more quickly. But Spain can be very crowded. Some people feel that 
Greece is more beautiful, the air is cleaner and the sea is bluer. Also the food is simpler in Greece.
      People prefer (更喜欢,宁愿) Greece this summer. Greece is the better choice (选择).
根据短文内容,回答下列问题。
1. Which countries are more popular than France and Italy? 
___________________________________________________________
2. Which is the cheaper way to travel to Spain or Greece? 
___________________________________________________________
3. Which country is prettier?
___________________________________________________________
4. Which country is more interesting? 
___________________________________________________________
5. Which country is more crowded?
___________________________________________________________
6. Which country is the better choice for people in this summer?
___________________________________________________________
阅读理解

阅读理解.

     All over the world people enjoy sports; sports help to keep people healthy and happy, and

to live longer.

     Many people like to watch others play games. They buy tickets or turn on their TVs to

watch the games. Often they get very excited when "their" player or team wins.

Some sports are so interesting that people everywhere go in for(参加) them. Football, for

example, has spread(展开)around the world. Swimming is popular in all countries near the

sea or in those with many rivers. What fun it is to jump into a pool or lake, whether in China,

Egypt or Italy! And think of people in cold countries. Think how many love to skate or ski

(滑雪) in Japan, Norway or Canada.

     Some sports or games go back thousands of years, like running or jumping. Chinese

wushu, for example, has a very long history. But basketball and volleyball are rather new.

Neither one is a hundred years old yet. People are inventing new sports or games all the

time. Water-skiing is one of the newest in the family of sports.

     People from different countries may not be able to understand each other, but after a

game together they often become good friends. Sports help to train(培养,训练) a person's

character(性格,品格).One learns to fight hard but fight fair, to win without pride and to lose

with grace(胜不骄,败不馁).

1. Why do people all over the world enjoy sports?

A. Because they are healthy.

B. Because they are happy.

C. Because they want to live longer.

D. All the above.

2. Why do some people get excited when they watch a game? Because________.

A. their favourite team wins

B. they win the game

C. they get the good news

D. they can't help themselves

3. Which of the sports has a long history?

A. Water-skiing.

B. Basketball.

C. Volleyball.

D. Long jump.

3. Why do people from different countries often become friends after a game together?

Because

A. they train their character in the game

B. they understand each other

C. they are friendly to each other

D. they help each other