问题 单项选择题 A1/A2型题

对于组织固定所起的作用不正确的是()。

A.保持细胞于生活时的形态相似,防止自溶与腐败

B.组织细胞内的物质经固定后对染料产生相同的亲和力,经染色后容易区别

C.组织细胞内的物质经固定后对染料产生不同的亲和力,经染色后容易区别

D.经过固定使细胞内的一些蛋白等凝固,使其定位于细胞内的原有部位

E.组织固定后可产生不同的折光率

答案

参考答案:B

阅读理解

阅读理解。

     My name is woof. You think that we have a great life, right? Wrong! I am going to tell you why.

     First of all, we are bored. Bored. bored. And bored. Do you ever think about what a dog does all day?

Nothing. Nothing at all. Our owners are busy, you know, working, going to school, away from home all day.

So what are we supposed to do? Watch the house or apartment? Sure. That is like watching paint dry or

grass grow. Boring. That's why we get so excited when our owners come home. We bark and run around

and act as if we are very happy. But we only do this because we are bored all day. If we are lucky, our owner

take us for a walk.

     Then there is the food. We eat the same food, meal after meal, day after day, week after week, month

after month. Help! Would you like to eat the same thing all the time? No, you would not. So what makes you

think we dogs like it? We don't. We hate it.

     Another thing-television.  Dogs hate television. Our owners watch these stupid programs, hour after hour,

night after night. Are there any programs for dogs on television? No. Not a single one.

      So what can we do? What else can we do but sleep? And so we sleep. We dogs are not lazy, we are

bored.

1. Woof may be a ______.

A. boy

B. girl

C. dog

D. cat

2. From the passage, we know that Woof ______.

A. lives a great life

B. is busy every day

C. likes the food very much

D. hates watching television

3. How many points does Woof complain about?

A. 1

B. 2

C. 3

D. 4

问答题 简答题