同一时间采集的头发和血液样品，其营养成分的水平反映的是机体同一时期的营养状况。

第二节 请选择方框中正确短语的适当形式完成下列句子（每空1分，共5分）

stare at, on the contrary, take a chance, in rags, as for，account for, do with

1. They lived a hard life, and they were usually ____________.

2. They serve well in this restaurant. ___________ dishes, they taste terrible.

3. He is not a beggar. ____________, he is a millionaire. 

4. The little girl _____________ the little cats playing with each other in their basket.

5. The rope might break, but we have to _____________.

下列语句：①面积相等的两个三角形全等；②两个等边三角形一定是全等图形；③如果两个三角形全等，它们的形状和大小一定都相同； ④边数相同的图形一定能互相重合．其中错误的说法有（　　）

A．4个

B．3个

C．2个

D．1个

根据汉语提示完成句子

1. The injured were in         （即刻的；立刻的） need of help.

2. She was told to clean the classroom__     _             _         （立刻）.

3. She began to cry                                                           （她一读到那封信）.

在2050年之后还可以使用的制冷剂有（）。

从理论上来说，市场组合M不仅有普通股资产构成，还包括（）等其他资产。

A.优先股

B.证券

C.债券

D.房地产

E.艺术品