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【单选题】
中频电作用后产生镇痛作用的有效时间为A.
5min
B.
l0~I5min
C.
l5~30min
D.
30min
E.
45 min以上
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反馈参考答案：
举一反三
【单选题】If you do something which it’s patently obvious that you don’t want to do, is it (a) clearly obvious, or (b) usually obvious?
A.
clearly obvious
B.
usually obvious
【简答题】乳剂中分散相的乳滴发生可逆的聚集现象称为____。
【单选题】. It is ________ that he hasn’t________.
A.
obviously; told the truth
B.
obvious; told a truth
C.
obvious; told the truth
D.
obviously; told truth
【简答题】直形冷凝管用于蒸馏沸点() °C的液体,空气冷凝管用于蒸馏沸点() °C的液体。
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