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【简答题】
旅客列车分特快、直快和普快，并依此为优先通行次序。某站在同一时间只能有一趟列车从车站开出，即只能给出一个开车信号。试画出满足上述要求的逻辑电路。设A、B、C分别代表特快、直快和普快；开车信号分别为Y A 、Y B 、Y C 。
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举一反三
【简答题】Dear Peter, My name is Frank. I am from America. Here is a picture of my friends. We are in the same grade. Look at the picture, in the middle, you can see my friend Jimmy. He likes all the sports. He...
【单选题】I went skiing with my friends. we all enjoyed ourselves .
A.
had a good time
B.
liked ourselves
C.
happy
D.
good
【单选题】I went skiing with my friends. We all enjoyed ourselves.
A.
had a good time
B.
liked ourselves
C.
happy
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