单项选择题
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.
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.
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单项选择题
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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多项选择题
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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