问题 单项选择题

我们在观察草履虫的运动时,由于草履虫的运动速度过快,影响观察,所以在观察时要限制其运动速度,采取的办法不可取的是()。

A、在载玻片上的草履虫培养液滴上放少量棉花纤维

B、用吸水纸从载玻片的边缘吸取一些水

C、用新鲜的蛋清加等量的水混合均匀后滴入载玻片的草履虫培养液

D、在培养液中放少许冰块

答案

参考答案:D

单项选择题
阅读理解

                                             79 Mayfair Road

Plumton, Kent

October 10th

Dear Rosemary,

I was very glad to get your letter this morning. I really ought to have written to you---it was my turn, I know----but I have been terribly busy. The children seem to take up all my time. I am thinking of sending Ann to a nursery school. She’ll be four next month. Baby has just started to walk and doesn’t give me a moment’s peace. But you know what it is like! How are all your children? I’m sure they love living in the country.

I’m afraid we can’t come over to see you next Sunday, as you suggest. Tom’s mother is coming to spend the day with us. What about the Sunday after that----- the twenty-second? We are free that day and should love to come. We’re longing to see your house.

Let me know, then, if the Sunday after next suits you. May we come for lunch? We’d like to leave fairly early in the evening to avoid the heavy traffic on the roads.

Love from us all,

Edna

小题1: Edna can not see Rosemary the following Sunday because_____.

A.she is afraid of the traffic     

B.Tom’s mother is coming to see them that day

C.she prefers to come on 22nd        

D.she is terribly busy with the children小题2:What doesn’t give Edna a moment’s peace?

A.That she has been thinking of sending Ann to a nursery school

B.That Tom’s mother will come soon

C.That she has been thinking of going to see Rosemary’s new house

D.That her baby has just started to walk小题3:We can infer from the letter that Tom is_________.

A.Edna’s husband

B.Edna’s son

C.Edna’s neighbor

D.Edna’s father