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【多选题】
我国根据具体环境条件的不同，规定的安全电压有( )电压等级。A.
6V
B.
12V
C.
24V
D.
36V
E.
50V
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【单选题】听力原文：(A) The woman is making coffee. (B) The window is being closed. (C) The woman is looking outside. (D) The woman is drinking coffee.
A.
B.
C.
【简答题】Yesterday, I met a delightful woman at a work . As we talked, she told me about her in Manila, Philippines. She spoke about the her culture values their elders,and she explained that children are...
【简答题】what is the difference between Davos man and Manila woman?
【简答题】为什么说静息电位是钾离子的平衡
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