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【判断题】
单作用叶片泵为变量泵。A.
正确
B.
错误
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举一反三
【单选题】下面关于写作的性质与地位表述有错误的一项是（ ）。
A.
写作能力是语文素养的综合体现
B.
写作是认识世界、认识自我、进行创造性表述的过程
C.
写作是表达和交流的一般方式
D.
写作教学应贴近学生实际，让学生易于动笔，乐于表达
【单选题】在2L的密闭容器中，加入1 mol和3 mol的H 2 和N 2 ，发生的反应为 在2s末时，测得容器中含有0.4 mol的NH 3 ，则该反应中H 2 的化学反应速率是 [ ]
A.
0.05 mol/(L·s)
B.
0.1 mol/(L·s)
C.
0.15 mol/(L·s)
D.
0.2 mol/(L·s)
【单选题】在固定容积的密闭容器中合成氨的反应达到了平衡，容器中含有0.1 mol N 2 、0.3 mol H 2 、0.1 mol NH 3 ，若维持原来的条件，向该容器中再加入0.1 mol N 2 、0.3 mol H 2 、0.1 mol NH 3 ，则( )
A.
正、逆反应速率同时增大，平衡不移动
B.
正、逆反应速率同时增大，NH 3 的百分含量升高
C.
正、逆反应速率同时增大，平衡向逆反应方向移动
D.
正、逆反应速率不变，平衡不移动
【简答题】容器中含有液态苯，在20℃下与容器上部的空气-蒸气相平衡，在阳光照射下，蒸气和液态苯由20℃增温到37.8℃，试计算单位体积容器会有多少苯被排出。假设原来容器中蒸气和液态苯各占一半体积。
【单选题】We must be careful with fire， or it__________. 查看材料
A.
will die
B.
will warm our houses
C.
might burn us
D.
won’t help us
【单选题】The passage suggests which of the following about the “women’s advocates and women statisticians” mentioned in lines 27-28?
A.
They wanted to call attention to the lack of pay for women who worked in the home.
B.
They believed that previous census information was inadequate and idd not reflect certain economic changes in the United States.
C.
They had begun to press for changes in census-taking methods as part of their participation in the antislavery movement.
D.
They thought that census statistics about women would be more accurate if more women were employed as census officials.
E.
They had conducted independent studies that disputed the official statistics provided by previosu United States censuses.
【单选题】Why have the public changed their opinion about drunken driving?
A.
Because detailed statistics on drunken slaughter are now available.
B.
Because they are no longer tolerant of the drunken slaughter.
C.
Because judges usually give more severe sentences to drunken divers.
D.
Because drunken drivers are conscious of their image.
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