中频电疗法的频率范围为（） A.0～1kHz B.1～100kHz C.100～20

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问题单项选择题 A1/A2型题

中频电疗法的频率范围为（）

A.0～1kHz

B.1～100kHz

C.100～200kHz

D.500～1000kHz

E.200kHz以上

答案

参考答案：B

听力题

After eating,you need to b_______ your teeth.

小题1:We usually go to bed at nine thirty,so we have a very h______ life.

小题2:Liangliang loves to play with his c______after class,they’re like his brothers and sisters to him.

小题3:I hope their dreams can come t______.

小题4:Ice -cream usually t______ good,so students like to eat it after school.

判断题

学习策略是指学习者为了完成一定的学习任务与目标，所采用的有效的行为活动。