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【单选题】
医用低频电流的频率范围为( )A.
0～1kHz
B.
1～100kHz
C.
100～1000kHz
D.
1000～10000kHz
E.
都不是
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【简答题】物理化学理论课每一章作业材料上传区A. 物理化学理论课每一章作业材料上传区
【单选题】He _____ you more help, if he had more time. e _____ you more help, if he had more time.
A.
might have given mig would give ht have given might have given
B.
would give
C.
may may have given
D.
will will give
【单选题】He you more help, even though he was busy.
A.
might have given
B.
might give
C.
may have given
D.
may give
【单选题】He you more help, even though he was very busy.
A.
might have given
B.
might give
C.
may give
D.
may have given
【简答题】机电新产品开发的整个过程可分为 、 、 、 四个阶段。
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