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【简答题】
要将缓慢变化的三角波信号转换成矩形波,则采用(__)触发器。
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反馈参考答案：
举一反三
【单选题】--Finish your homework, _______you can't go out to play. --All right, Daddy.
A.
but
B.
till
C.
and
D.
or
【单选题】You can't go out _____ you _____ all your work.
A.
if; will finish
B.
in case; finish
C.
unless; finish
D.
if; will not finish
【单选题】集装箱船运输中,冷藏集装箱可配装在 (41988:第十二章_集装箱运输:2414)
A.
舱内
B.
上甲板
C.
视集装箱的冷却方式而定
D.
冷藏箱的配制与其冷却方式无关
【单选题】You can't go out and play ______ you've done your homework. [ ]
A.
when
B.
since
C.
while
D.
until
【单选题】—John, you can't go out to play until your homework _____. —OK, Mum. [ ]
A.
finishes
B.
has finished
C.
is finished
【简答题】Without __________ you can't go out. (permit)
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