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问题 单项选择题

全口义齿后牙选用无尖牙的优点不包括

A．侧向力小

B．有利于义齿的稳定

C．容易达到平衡合

D．对牙槽嵴损害小

E．咀嚼效率低

答案

参考答案：E

填空题
用方框内所给词的适当形式填空。
write,   find,    popular,   make,   careful,   is,   big,   win,   last,   north
1. We _______ our New Year's resolutions yesterday.                              
2. I'm  _______ a letter to my pen pal.                                          
3. I will be more _______ next time.                                              
4. An old lady said she _______ a job as a programmer.                            
5. There _______ no TV in the old days.                                            
6. This apple is the _______of all. The others are smaller than it.              
7. Each lesson _______ forty-five minutes nowadays.                              
8. Harbin is in the_______of China. It's cold in winter.                        
9. Liz_______the prize for the funniest performer in 2004.                      
10. I think soccer is _______ than basketball, because more people like playing it.
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选择题

下列物质中，pH最大的是（　　）

A．食盐水

B．纯净水

C．食醋

D．石灰水
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