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【单选题】
下列传播途径中与艾滋病无关的是（）A.
性接触
B.
母婴传播
C.
静脉注射
D.
器官移植
E.
虫媒
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反馈参考答案：
举一反三
【简答题】单个柱塞缸只能实现 运动。
【单选题】--- You look very tired. _____ at all last night? --- No, not really. I’m tired out now.
A.
Do you sleep
B.
Were you sleeping
C.
Did you sleep
D.
Had you slept
【单选题】Couples having infant children ______.
A.
are lucky since they can have a whole night's sleep
B.
find fun in tucking them into bed at night
C.
find more time to play and joke with them
D.
derive happiness from raising their children
【简答题】Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep. Until the early 1950s, most sci...
【单选题】---May I speak to Mr. Smith? --- He __________. Can I ______ a message?
A.
is sleeping, take
B.
will sleep, take
C.
sleeps, bring
D.
is sleeping, get
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