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【单选题】
They _____ with each other at first sight and got married soon. Until now they _____ still _____ and live a happy life. [ ]A.
fell in love; fall; in love
B.
were in love; are; in love
C.
fell in love; are; in love
D.
were in love; fall; in love
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举一反三
【简答题】Not stated but implied in the first two paragraphs is that stopping smoking can be a(n) ______ for you.
【单选题】主与客的方位,包括"方”与"位”两个方面,"方”是指( ) "位”是指( )。
A.
面朝哪个方向，位次
B.
坐在哪里，位次
C.
地方，位置
D.
面朝哪个方向，坐在何处
【单选题】It can be implied that the cars of 2020______.
A.
will be owned by individuals
B.
will improve the condition of traffic
C.
will have advanced brake and accelerator
D.
can't avoid the happening of accidents
【单选题】下列说法正确的是（ ）。
A.
信号的持续时间越长，则信号占有的频带宽度越宽。
B.
信号的持续时间越长，则信号占有的频带宽度越窄。
C.
信号的持续时间短，则信号占有的频带宽度窄。
D.
信号的持续时间与其所占有的频带宽度成正比。
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