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【单选题】
关于室性期前收缩,下列说法错误的是A.
症状的轻重与早搏的频发程度不直接相关
B.
听诊时,室性期前收缩后出现较长的停歇
C.
第一心音强弱不等
D.
颈静脉可见巨大a波
E.
时限>0.12秒,形态宽大畸形
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举一反三
【简答题】概述SQL Server中数据存储和访问的方法。
【单选题】—Must I finish my homework right now? -- No, you ___, you ___finish it tomorrow morning.
A.
mustn’t, can
B.
needn’t, must
C.
don’t have to, may
D.
can’t, have to
【单选题】—Must I finish my homework now? —No, you ______. But you ______ finish it after supper. [ ]
A.
needn't, must
B.
mustn't, must
C.
needn't, need
D.
mustn't, may
【单选题】－What do you think of the party last night? －Wonderful! It’s years I enjoyed myself so much.
A.
after
B.
when
C.
before
D.
since
【单选题】I enjoyed myself so much ______ I visited my friends in Paris last year.[2008]
A.
when
B.
which
C.
that
D.
where
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