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【单选题】
关于细胞连接结构错误的是（）A.
在电镜下点状、斑状和带状结构
B.
一般以柱状上皮细胞的连接最为典型
C.
在光镜下也可观察到
D.
是一种在上皮细胞侧面分化形成的特殊结构
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举一反三
【单选题】I know you must have taken every necessary step to ________ that the experiment will not fail. But I want to be _________.
A.
assure; insured
B.
insure; ensured
C.
ensure; reassured
D.
assure; ensured
【简答题】Iknow you must have taken every necessary step to _____ that the experiment will not fail.(assure; ensure; insure; reassure)
【单选题】I know you must have taken every necessary step to __________ that the experiment will not fail. But I want to be ___________.
A.
assure, ensured
B.
ensure; assured
C.
insure; assured
D.
ensure; reassured
【单选题】You must have taken a lot of _______________ to practice.
A.
efforts
B.
effects
C.
money
D.
energy
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