在抓取实验动物时（）引起动物的不安、惊恐、疼痛和损伤。
A.可以
B.根据实验需要可以
C.应避免
D.需要减少
参考答案：C
Questions 1-4
Which of the following can be concluded about the woman？（）
A．She dislikes the man’s wife.
B．She enjoys spending money on cosmetics.
C．She is married to a poor man.
D．She is economical with her money.
食物的消化是从下列哪一部位开始的（）
A.胃
B.小肠
C.食管
D.口腔
