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问题 选择题

下列各组关系正确的是：

A．原子半径 N<P<S

B．稳定性 NH3<H2O<HF

C．碱性 NaOH>KOH

D．酸性 H3AsO4>H2SeO4>HBrO4

答案

答案：B

题目分析：A、原子半径 N<S<P，错误；B、氢化物稳定性与元素非金属性一致，正确；C、碱性 KOH>NaOH，错误；D、非金属性 As<Se<Br酸性 H3AsO4<H2SeO4<HBrO4，错误。

单项选择题

While making rounds in a senior citizens’ housing complex, the visiting nurse discovers one of her clients sobbing in her darkened apartment. On questioning the client, an 85- year-old widow, the nurse learns that her pet cat of 15 years had been put to sleep the day before. What’s the nurse’s best response

A. "It shouldn’t be hard to find another cat. You’ll feel better once you have another pet. "
B. "It was only a cat. Why are you allowing yourself to be so upset It would be different if it were a person. "
C. "I’m so sorry that your pet had to be put to sleep. I know how important your cat was to you. "
D. "It’s probably best for the cat because it was so old and ill. "
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多项选择题

关于开胸手术肺门反射的叙述，正确的说法是（）

A.迷走神经参与

B.牵拉解剖肺门部位可诱发

C.刺激后心动过速

D.可引起早搏

E.局麻药封闭可缓解
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