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问题 选择题

实验室里保存下列试剂，对其保存的方法和理由的描述均不正确的是（　　）

编号试剂保存方法理由
A固体氢氧化钠保存在带橡皮塞的细口瓶中防止与空气接触被氧化
B浓硝酸保存在密闭的棕色瓶中浓硝酸见光容易分解
C碳酸钠晶体保存在干燥密封的广口瓶中防止风化而碎裂成粉末
D白磷保存在水中白磷在空气中易自燃

A．A

B．B

C．C

D．D

答案

答案：A

单项选择题

M: You’ve had your hands full and have been overworked during the last two weeks. I think you really need to go out and get some fresh air and sunshine.
W: You are right. That’s just what I am thinking about.
Q: What is the woman most probably going to do().

A. Have a short break.

B. Take two weeks off.

C. Continue her work outdoors.

D. Go on vacation with the man.
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单项选择题 A1型题

以下叙述正确的是（）

A.膝眼不可以治疗脚气

B.十宣不可以治疗癫痫

C.四神聪可以治疗目疾

D.四缝不可以治疗小儿疳积

E.夹脊穴不可以治疗胸腹疾患
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