自我应用人数最多的氟化物防龋措施是
A．口服氟片B．含氟牙膏C．饮水加氟D．牛奶加氟E．氟凝胶
参考答案：B
Mike’s father, as well as his mother, commanded that he _____ home.
A．stayed
B．could stay
C．stay
D．has stayed
属于正治的是()
A.以寒治寒
B.热因热用
C.用寒远寒
D.以补开塞
E.以寒治热
