王俊同学发烧了，到医院检查身体．验血后发现白细胞数目升高，医生会告诉他什么呢？（　　）

①求证：CE∥BF； 

②若BD=2，且EA：EB：EC=3：1：$\sqrt{5}$，求△BCD的面积（注：根据圆的对称性可知OC⊥AB）．

下图是制作临时装片的几个步骤，正确的操作顺序是 (     )

根据对话内容,从方框内的选项中选出能填入空白处的最佳选项,其中有两个为多余选

A: Did you hear about the flood in Wuhan last night?

B: No. ____

A: My e-friend Lin Tao told me about it.It rained for a long time.

B:  ____

A: For about two weeks.

B:  ____

A: Yes, it was very terrible.There was water all around his house. Most of his furniture and his books get wet.

B:  ____ Did your e—friend still live in his house?

A: No. ____ There was no flood there because his uncle lives far away.

A. Oh, really?

B. That sounded bad.

C. He and his family moved to his uncle's house.

D. What happened?

E. How long did the rain last?

F. That sounded great.

G. That's all right.