"水"的特性是()
A.曲直
B.稼穑
C.炎上
D.润下
E.从革
参考答案:D
David talked with a friend of ________ on the Internet for a long time yesterday. [ ]
A. he
B. his
C. him
D. himself
人的卵原细胞中有46条染色体。在减数第一次分裂形成四分体时,细胞内同源染色体对数、姐妹染色单体数、DNA分子数依次为()
A.23对、46条、92个
B.46对、92条、92个
C.23对、92条、92个
D.46对、23条、46个