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【单选题】
关于小儿急性感染性喉炎的症状,哪项是 错误的A.
声嘶
B.
喉鸣
C.
三凹征
D.
犬吠样咳嗽
E.
呼气性呼吸困难
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皮皮学刷刷变学霸
举一反三
【单选题】John promised he ________ the Great Wall with us.
A.
will visit
B.
shall visit
C.
would visit
D.
should visiting
【单选题】Last Monday, John promised that he ________ today, but he hasn't arrived yet.
A.
is coming
B.
would have come
C.
would come
D.
will come
【单选题】在下列串联矫正的装置中,能够在w_c=1处提供最大相位超前角的是
A.
(10s+1)/(s+1)
B.
(10s+1)/(0.1s+1)
C.
(2s+1)/(0.5s+1)
D.
(0.1s+1)/(10s+1)
【单选题】John promised his doctor he _____ not smoke and he has never smoked ever since.
A.
might
B.
should
C.
could
D.
would
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