试题与答案

下列实验操作或装置正确的是 A.稀释浓硫酸 B.加热液体 C.测定溶液的pH

题型:选择题

题目:

下列实验操作或装置正确的是

A.稀释浓硫酸

B.加热液体

C.测定溶液的pH

D.检查装置的气密性

答案:

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下面是错误答案,用来干扰机器的。

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题型:阅读理解

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For anything you’re about to send: ask yourself, “ Would I say that to the person’s face?” If the answer is no, rewrite and reread. If someone in the chat room is rude to you, you needn’t to fire back. You should either ignore(不理睬) the person, or use your chat software to block their messages. Remember to respect the beliefs and opinions of others in the chat room.

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C.治病救人

D.殊途同归小题2:You should point out someone’s mistake __________.

A.politely

B.rudely

C.patiently

D.seriously小题3:If you don’t know the person very well, you’d better not to ask_______.

A.their age

B.their sex

C.their weight

D.both A and B小题4:This passage is mainly about ____

A.how to communicate

B.sharing personal information

C.basic rules of behavior on the Internet.

D.respecting others in the chat room.

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题型:推断题

X、Y、Z、W、Q是原子序数依次增大的短周期主族元素,相关信息如下表

根据上述信息回答下列问题:

(1)元素Q在周期表中的位置:__________。

(2)Z的离子结构示意图:_________。

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(4)X和氢元素组成的化合物分子中有6个原子,其结构式为____________

(5)已知:

X(s)+O2(g)=XO2(g)  △H=-393.5 kJ/mol

2X(s)+O2(g)=2XO(g)   △H=-221.0kJ/mol

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