问题
单项选择题
拔牙钳喙与牙长轴平行是为了( )
A.夹住患牙
B.省力
C.防止邻牙损伤
D.避免牙龈损伤
E.利于使用扭转力
答案
参考答案:C
解析: 拔牙时拔牙钳喙与牙长轴平行,牙钳就不会误夹在邻牙上,可防止邻牙损伤。
拔牙钳喙与牙长轴平行是为了( )
A.夹住患牙
B.省力
C.防止邻牙损伤
D.避免牙龈损伤
E.利于使用扭转力
参考答案:C
解析: 拔牙时拔牙钳喙与牙长轴平行,牙钳就不会误夹在邻牙上,可防止邻牙损伤。
用方框中所给词或词组的正确形式填空,每个词或词组只用一次。 | |
2. What about _______ in the park on Sunday? 3. Miss Gao often ______ to work. 4. The weather in China ______ that in America. 5. The twins were born in New York, but they ______ in London. 6. He ______ school at 7:30 every day. 7. —What do you ______ the Chinese people? —They are very friendly. 8. Jim, let's ______ the stone, it's dangerous on the road. 9. UN ______ the United Nations. 10. She often ______ me ______ my English. |