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问题 选择题

The lion is considered a(n) ________ of courage and power, and the other animals see him as kings of the forest.

A．mark

B．example

C．sign

D．symbol

答案

答案：D

问答题

为了测定水的组成选用下列装置回答问题：（氢气用盐酸和锌制得）

（1）为准确测定水的组成，为防止杂质干扰，正确的连接顺序为：己→______→丙；

（2）乙装置的作用是______．

（3）若测得丁装置中样品在实验前后减少6.4克，乙装置中药品增加了7.2克，丙装置增加了3.6克，根据此可求出水中H、O质量比为（只写计算式）______．

（4）实验结束后，若丁处仍有黑色固体，这对实验的结果的影响是______（填“氧的质量偏大”、“氢的质量偏大”、“无影响”）；

（5）装置中的丙能否省去？______为什么？______．
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单项选择题

Questions 14-23


·Look at the ten statements for this part.
·You will hear a story about communication through time.
·Decide whetheryou think each statement is right(R) wrong(W) or not mentioned(NM).
·You will listen to it twice.
·Markyour answers on the Answer Sheet.

The time chosen for the call doesn’t communicate its importance.

A. Right

B. Wrong

C. Not Mentioned
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