题目内容

Cloning plants is straightforward           cloning animals is very complicated .
A．so thatB．althoughC．whileD．as if
C
词义辨析题。A. so that 为的是   B. although 尽管  C. while 然而  D. as if 似乎 句意：克隆植物直接然而克隆动物非常复杂。 根据语境选C
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