A．气相色谱法 B．原子吸收分光光度法
C．高效液相色谱法 D．红外分光光度法
E．薄层色谱法
检查石膏中重金属含量所用的测定方法是
A．
B．
C．
D．
E．

听力原文：M: Would you like some toast and jam, Mom?W: Why, yes, thank you. I believe I would. That's mother's dear boy, always thinking of others. Only not too much jam on my toast.What did the woman think about the man?A．He isn't a selfish man.B．He's her loving son always thinking of her.C．He's a helpful young man.D．He's loved by others.

A.
What
B.He
C.
B．He's
D.
C．He's
E.
D．He's
F.

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一个人对工作的行为倾向表现为（）

A．对工作的需要
B．对工作的动机
C．对工作的自觉性
D．对工作的责任感
E．对工作的积极性

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