已知:① 1molH2分子中化学键断裂时需要吸收436kJ的能量;② 1molC

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问题:

已知:① 1molH2分子中化学键断裂时需要吸收436kJ的能量;② 1molCl2分子中化学键断裂时需要吸收

243kJ的能量;③ 由H原子和Cl原子形成1molHCl分子时释放431kJ的能量。下列叙述正确的是 [ ]

A.1个氢分子和1个氯分子反应生成1个氯化氢分子,反应的△H=-183kJ·mol-1

B.氢气与氯气反应生成2mol氯化氢气体,反应的△H=183kJ·mol-1

C.氢气与氯气反应生成2mol氯化氢气体,反应的△H=-183kJ·mol-1

D.氢气与氯气反应生成1mol氯化氢气体,反应的△H=-183kJ·mol-1

考点:化学键与化学反应中能量变化的关系
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问卷的整个设计过程大体上分为()、()和()三个阶段。

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完成句子。

1. The first time I went to visit him, he (碰巧在聊天) with a nerghbour.(happen)

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2. Hardly (她一走进) her office when she felt faint and had to lie down.(enter)

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3. (被群山环绕),the beautiful village attracts a large number of tourists each year.(surround)

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4. They were all for your suggestion that the discussion (推迟) until next weekend.(put)

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5. If the government (采取了措施) to keep viewers from possible harmful influences of media last

   year, the crime rate would be lower now.(measure)

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6. The newly-built airport of the city is (两倍大) what it used to be.(size)

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7. A number of new machines were installed in the factory, thus (导致增长) in production.(result)

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8. (给我印象最深的) is that he constantly wishes to improve himself in terms of knowledge

     and skill.(impress)

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9. The laws (已经修订) to protect the rights of women and children recently.(revise)

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10. I'll go back to the village (把我养大的) and live there forever after retirement.(bring)

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城市主要防洪对策可分为以蓄为主和以排为主两种,以下属于以蓄为主的是( )。
①水土保持;②修筑堤防;③修建水库;④整治河道

A.①②
B.②③
C.①③
D.②④

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端午节不仅是汉族的节日,有些少数民族也过端午节。 ( )

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什么叫不完全定位

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