中齿锉刀的加工精度在（）mm范围。
A.0.01~0.05
B.0.05~0.2
C.0.2~0.5
D.0.005~0.01
参考答案：B
Do you still remember the rider and his new bike we saw in the street last week?
A．which
B．who
C．that
D．whom
衣原体感染应首选：
A．氯霉素
B．庆大霉素
C．克林霉素
D．阿莫西林
E．多西环素
