天然气井漏气事故，井漏喷出的气主要是甲烷，另外还含有大量的硫_爱下问搜题

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问题填空题

天然气井漏气事故，井漏喷出的气主要是甲烷，另外还含有大量的硫化氢。硫化氢是一种有臭鸡蛋气味、剧毒的无色气体，密度比空气大，能溶于水。具有可燃性，能与碱发生反应生成盐和水。请根据以上材料简要列出硫化氢的物理性质和化学性质。

物理性质：_________________________________

化学性质：_________________________________

答案

物理性质：①无色有臭鸡蛋气味的气体，②密度大于空气，③能溶于水

化学性质：①有剧毒，②具有可燃性，③能与碱发生反应。

阅读理解

完形填空先通读下面的短文，掌握其大意，然后从下面四个答案中选择可以填入相应空白处的最佳答案。（本大题共10分，每小题1分）
Do you have many friends in this busy and noisy world? I think you can give me your answer without thinking for a minute. Friendship is so 1 that no one can live if he has no friends. One is happy to have a good friend to talk, laugh, and do some other things with. Everyone will feel 2 if he has no friends. Maybe you will say that sometimes friends quarrel (争吵)with each other, but it doesn't matter. That doesn't mean they no longer 3 each other. They will make up and become 4 again. If our friends go to another place, we will feel very sad. We 5 them very much, but we can 6 them or write to them. Maybe we will never see them 7 . And we can make new friends. It is surprising to find out 8 we like new friends when we get to know them. There is more good news for people who have friends. They live longer than people who have no friends or have few friends. Why? Perhaps because they are 9 . Being happy helps you keep healthy. If you know someone cares about you, you
10 take better care of yourself. Do you think so?

单项选择题

骨髓象不同而血象相似的疾病是

A．多发性骨髓瘤和浆细胞白血病

B．PNH和再生障碍性贫血

C．缺铁性贫血和巨幼细胞性贫血

D．类白血病反应和慢性粒细胞白血病

E．溶血性贫血与急性失血性贫血