问题
单项选择题
氟化物的防龋机制不包括
A．降低釉质溶解性
B．杀灭致龋菌
C．促进再矿化
D．抑制细菌酶
E．影响牙外形
答案
参考答案：B
解析：氟化物的防龋机制不包括杀灭致龋菌。
搜题请搜索小程序“爱下问搜题”
氟化物的防龋机制不包括
A．降低釉质溶解性
B．杀灭致龋菌
C．促进再矿化
D．抑制细菌酶
E．影响牙外形
参考答案：B
解析：氟化物的防龋机制不包括杀灭致龋菌。
| 用方框中所给单词的适当形式填空，每词限用一次。 | |
2. Take the bus, and you will get to the university in five ______. 3. All of the children had a ______ school trip to the mountain. 4. I heard the ______ news that there was an accident on wall street this morning. 5. The river ______ again after the storm yesterday. |