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请教大家一道题目:大全第18题。
A peculiar feature of the embryonic mammalian circulatory system is that in the area of the heart the cells adhere to one another, beating in unison and adopting specialized orientations exclusive of one another. D
(A) beating in unison and adopting
(B) they beat in unison while adopting
(C) beat in unison, and adopt
(D) beating in unison yet adopting
(E) even though they beat in unison and adopt
这句话怎么能看出是转折的意思,当时做的时候在A和D之间徘徊了好久,结果还是选了错误答案。 |