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【单选题】
在电子显微镜上，单位膜为（ ）A.
一层深色带
B.
一层浅色带
C.
二层深色带和中间一层浅色带
D.
二层浅色带和中间一层深色带
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反馈参考答案：
举一反三
【单选题】— ______ that he picked up his uncle at the airport? — It was at 6:00 in the afternoon ______ he got off work. [ ]
A.
Was it when; that
B.
When was it; that
C.
Was it when ; when
D.
When was it; when
【单选题】--- _______ that he picked up French? --- It was in 2010 _______ he traveled in France.
A.
Was it when; that
B.
When was it; that
C.
Was it when; when
D.
When was it; when
【单选题】After_____a11 the apples，he____ the biggest one in the basket and handed it to me．
A.
picked；picked up
B.
picking；picked out
C.
picking Out；picked
D.
picking up；picked
【简答题】磺胺类药的不良反应有________、________和________等。
【单选题】He ______ the phone expecting to hear the chairman's gruff voice. A. picked up B. picked at C. picked on D. picked out
A.
picked up
B.
picked at
C.
picked on
D.
picked out
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