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问题 填空题

用birth的正确形式完成句子。

①She ____a girl. 她生了一个女儿.

②She____ him a son.她给他生了个儿子.

③The apple tree___ a lot of fruit.这棵苹果树上结了很多果子.

④I___ in 1981. 我生于1981年.

答案

①gave birth to/bore ②bore ③bore ④was born

补全对话，情景问答
选择句子补全对话。
A. Did she see the doctor?        
B. How does she feel?
C. Where is she now? 
D. I'm sorry to hear that.
E. What's the matter with her?  
F. Does she have a headache?
G. Does she have a toothache?
Teacher: Lily is not in the class. 1.                                     
Sarah: She is at home.                
Teacher: 2.                                     
Sarah: She is sick. She has a cold.
Teacher: 3.                                     
Sarah: Yes, she has a headache.
Teacher: 4.                                    
Sarah: Yes, she did. And the doctor asked her to take some medicine and stay in bed for one day.    
Teacher: Oh, 5.                                  I hope she will be better soon.
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计算题

欲使100g 9.32 % 的NaOH溶液溶质的质量分数增大到20%

（1）需往溶液中加入多少克金属钠？

（2）若20%NaOH溶液的密度为1.066 g/cm3，计算物质的量浓度。
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