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【单选题】
巴比妥类药物与反应是由于结构中含有( )A.
△4-3-酮基
B.
芳香伯氨基
C.
酰亚氨基
D.
酚羟基
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举一反三
【单选题】How can you expect to learn anything ____ youn
A.
31. How can you expect to learn anything ____ younever listen? ( 山东 ) A. in case
B.
even if
C.
unless
D.
when
【简答题】You need the right college What’s out there? How can you learn all of America’s colleges? How do you find the best match— the best college for you? Big or small, conservative or liberal, private or pu...
【简答题】How can you expect to learn anything ____ you never listen? A. in case B. even if C. unless D. when
【判断题】n期先付年金与n期后付年金现值的付款次数相同,但由于付款时间的不同,n期先付年金终值比n期后付年金终值多计算一期利息。因此,可先求出n期后付年金的终值,然后再乘以(1+i),便可求出n期先付年金的终值。( )
A.
正确
B.
错误
【单选题】—How can I learn English well? —You will learn it well ________ you practice speaking it often.
A.
unless
B.
as for
C.
as soon as
D.
as long as
【单选题】—How can I learn more about computer science? —You can learn by _____ questions. [ ]
A.
asked
B.
asking
C.
be asked
D.
ask
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