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【单选题】
74LS160的计数条件是:A.
ET=1 EP=1
B.
ET=0 EP=1
C.
ET=1 EP=0
D.
ET=0 EP=0
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反馈参考答案：
举一反三
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【判断题】The students should understand that you can't let your failures define you, you have to let your failures teach you, you have to let them show you what to do differently the next time. (1.0分)A. √ B. ╳
A.
正确
B.
错误
【单选题】－－－ Does he study very hard at school? －－－ Yes, he studies _____.A．very indeed hardB．hard very i
A.
49. --- Does he study very hard at school? --- Yes, he studies _____. A．very indeed hard
B.
hard very indeed
C.
very hard indeed
D.
indeed very hard
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【单选题】Some evidence threw doubt on ______ he had lent the money to the defender.
A.
if
B.
which
C.
that
D.
Whether
【单选题】He missed the train this morning ______ he got up late．
A.
or
B.
if
C.
but
D.
because
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