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问题 选择题

为证明稀硝酸与铜反应生成的气体为NO，设计如图实验（实验过程中旋塞2为打开状态），下列说法中不正确的是

[ ]

A．关闭活塞1，加入稀硝酸至液面a处

B．在装置左侧稍加热可以加快稀硝酸与铜的反应速率

C．通过开启或关闭活塞1可以控制反应的进行

D．反应开始后，胶塞下方有无色气体生成，还不能证明该气体为NO

答案

答案：A

多项选择题

在办理异地绿卡取款交易时，应打印（）.

A.取款凭单

B.手续费收据

C.利息清单

D.通用凭证
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填空题

The problem is my weight. I’m just 1.57 meters high, but 61. ______
my weight is 75 kilos. Many students often make a fun 62. ______
of me. Some boys were unfriendly for me—they call63. ______
me "meat ball". That makes me to feel unhappy. 64. ______
Although I’m a bit too fat, yet I feel very well. I65. ______
enjoy my meal. I love eating meat very much. And I like 66. ______
sweet food, though. I often have sugar with tea, milk. In 67. ______
the past two months I had put on 5 kilos. So I’m becoming 68. ______
more and more worried this problem, but I don’t 69. ______
know to lose weight quickly. Could you help me, dear doctor 70. ______
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