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【判断题】
在假言判断中,如果 p 是 q 的必要条件,那么 p 的否定就是 q 的充分条件。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】If you are a(__) to someone for something that you do, you are responsible for it and must be prepared to justify your actions to that person. (11 letters)
【单选题】Whatever we do in life,wherever life's storms___us,there must be something we can achieve.
A.
toss
B.
fall
C.
throw
D.
lose
【简答题】生命活动最基本的特征是( ) A.新陈代谢 B.兴奋性 C.适应性 D.生殖 E.以上都不是A. 新陈代谢
【单选题】Something ______to save our earth. Do you think so? A. can do B. must do C. has to do D. must be done
A.
1
B.
2
C.
3
D.
4
【单选题】Something ___ to save our earth. Do you think so?
A.
can do
B.
must do
C.
has to do
D.
must be done
【简答题】NPN 型晶体三极管工作在放大状态时,三个极中电位最高的是 极。 PNP 型晶体三极管工作在放大状态时,三个极中电位最高的是 极
【单选题】— What a mess! — Hurry up! Something ______. The guests are coming. [ ]
A.
must do
B.
must be done
C.
must be do
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