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【简答题】
下表列出了空气、氧气、二氧化碳、氨气在标准状况下的密度和溶解性． 物质 空气 氧气 二氧化碳 氨气（NH 3 ） 溶解性 / 不易溶 能溶 极易溶 加热 已知实验室可用下列反应制取氨气：2NH 4 C1（固）+Ca（OH） 2 （固）═CaCl 2 +2NH 3 ↑+2H 2 O． （1）根据上述信息，选择实验室制取和收集氧气、二氧化碳、氨气的装置，请在相关空格处√． 氧气 二氧化碳 氨气 （2）写出图中有标号仪器的名称：a______；b______． （3）若用锌和稀盐酸常温下制氢气，同时生成氯化锌．则选用的发生装置是______ ④选用A作为发生装置的必须具备条件是______．
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【单选题】Tihe young ma n insisted he ____no thing wrong and that the police___him．
A.
did: released
B.
had done; release
C.
had done; must release
D.
should do; should release
【简答题】The young man at the counter had some sort of registration problem. It is _______ in the first year. The woman behind the counter clearly felt, as I did, _______ for this young man, who was _______ by...
【简答题】A. It was brave of him. B. What happened? C. How was the young man then? D. What’s wrong with the girl? E. A young man came up at that time. F. What do you think of the young man? G. No, he ...
【简答题】阅读短文，从 41～50 中选出正确答案。 A young man (Example: 0 ) going to join the army () and had to 11 a medical examination. The doctor was sitting at a desk when he came in. He said to the man, “Take your coat a...
【单选题】关于窦房结的描述，错误的是
A.
窦房结位于上腔静脉和右心房结合部心外膜下
B.
呈椭圆形
C.
血液供应来自窦房结动脉
D.
窦房结内有普肯耶细胞
E.
主要受左侧神经的支配
【简答题】A young man was going to join the army and had to take a medical examination. The doctor was sitting at a desk when he went in. He said to the man. “Take your coat and shirt off, and sit on the chair....
【简答题】The young man at the counter had some sort of registration problem. It is inevitable in the first year. The woman behind the counter clearly felt________________(局促不安,不好意思), as I did,for this young ma...
【单选题】--- The young man spent as much time as he _______ the experiments. --- No wonder he succeeded _______.
A.
did; by the end
B.
could doing; in the end
C.
could doing; at the end
D.
could to do; in the end
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