问题 单项选择题 A1型题

关于化生的叙述,下列错误的是()。

A.是机体组织的适应性反应

B.是向成熟、性质相似的细胞转化

C.是未分化细胞向另一细胞方向分化所致

D.某些化生上皮可发生癌变

E.细胞转化过程是已分化的细胞直接分化为另一种细胞

答案

参考答案:E

解析:化生是一种分化成熟的细胞转变成另一种成熟细胞的过程,是机体组织对损伤的适应性反应,并不是由已分化的细胞直接分化为另一种细胞,而是未分化细胞向另一细胞方向分化所致,并只能向成熟、性质相似的细胞转化。化生的细胞常是癌变的基础。

阅读理解

阅读理解。

     In Japan, you say "itadakimasu"("I am going to start")before eating, and "gochisosam(deshita)"

("Thank you for the meal")after finishing the meal.

◆Eating rules

     Blowing your nose in public, and especially at the table, is considered bad manners.It is considered

good manners to eat up all the things in your plate.Unlike in some other parts of East Asia, it is

considered bad manner to burp(打嗝).After eating, try to move all your dishes back to the same

position they were at the start of the meal.

◆Drinking rules

     When drinking alcohol(酒), it is a good manner to serve each other, instead of serving yourself.

Check your friends' cups from time to time and refill(重新注满)their drinks if their cups are getting

empty.If someone wants to serve you more alcohol, you should quickly empty your glass and hold

it towards that person.

     While it is considered bad manners to become drunk in some formal restaurants, the same is not

true for other small restaurants, as long as you do not trouble other guests.

     Do not start drinking until everybody at the table is served and the glasses are raised for a drinking

salute(口号), which usually is "kampai".

1.In Japan, you say "itadakimasu" ______.  

A.before eating

B.while eating

C.after eating

D.before drinking

2.All these are good manners in Japan except ______.

A.eat up all the things in your plate

B.after eating, move all your dishes back

C.serve alcohol to each other

D.blow your nose in public

3.From the second paragraph we may know that ______.  

A.in Japan you may burp after eating 

B.in some East Asian countries you may burp after eating

C.in some West Asian countries you may burp after eating

D.in the western countries you may burp after eating

4.If someone wants to serve you more alcohol in Japan, you should______.    

A.serve them quickly

B.refuse it politely

C.say "That's enough"

D.empty your glass and hold it

5.Which of the following is the right drinking rule?  

A.When drinking alcohol, it is a good manner to serve yourself.

B.Check your friends' cups from time to time and refill them if they are empty.

C.It is considered bad manners to become drunk in all the restaurants.

D.Start drinking if only one person is not served.

单项选择题 A1/A2型题