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【单选题】
哌替啶不宜单独用于胆绞痛的原因是A.
瘾
B.
易引起便秘
C.
使胆道括约肌收缩
D.
抑制呼吸
E.
使胆道平滑肌松驰
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反馈参考答案：
举一反三
【单选题】No one could explain how it had () that he survived the air crash.
A.
become
B.
arrived
C.
resulted
D.
come about
【简答题】It was said that computers could crash because they were______(able) to make sense of '00' for the year 2000.
【简答题】The crash could be reasonably ______(regard) an opportunity to invest.
【单选题】The stock market crash could ______ a valuable industry.
A.
cripple
B.
crinkle
C.
boost
D.
construct
【多选题】Which of the following could trigger a stock market crash? ( )
A.
Speculation
B.
Excessive leverage
C.
Tax changes
D.
Panic
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