据句意和首字母提示填入所缺单词。

1.  Mom, this is my best f_____, Lucy.

2.  My books are on the t_____.

3.  Does your brother have a s_____ball?

4.  His brother usually w_____ TV on weekends.

5.  Please, b_____ your family photo to school.

6.  Her mother likes to eat fruit s_____.

7.  The second day of the week is M_____.

8.  How much are your s_____?

9.  My b_____ is in February.

10.  Can you play the g_____?  

利用聚乙二醇(PEG)沉淀法检测CIC时，PEG最终浓度是

A．1%～2%

B．2%～3%

C．3%～4%

D．4%～5%

E．5%～6%