GWD 17-32

fighing

Navigators have known for thousands of years that the ocean has variable currents, but it is only in the last half century that a reasonably clear picture has emerged of the patterns and causes of ocean currents.>>

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A  a reasonably clear picture has emerged of the patterns and causes of ocean currents

B  a reasonably clear picture of the patterns of ocean currents and their causes have emerged

C  a reasonably clear picture emerged of ocean currents, their patterns and the causes of them

D  there have emerged a reasonably clear picture of the patterns of ocean currents and what caused them

E  there had emerged a reasonably clear picture of the patterns of ocean currents and their causes

Answer: A

 

of the patterns and causes of ocean currents为什么放在emerge后面呀？

miaoyin_tx

避免头重脚轻

fighing

如果B中的have为has那还是A比B好吗？

ninihao

Navigators have known for thousands of years that the ocean has variable currents, but it is only in the last half century that a reasonably clear picture has emerged of the patterns and causes of ocean currents.

B.(a reasonably clear picture of the patterns of ocean currents) and (their causes) have emerged

用have改变原文的意思，变成了picture和causes的并列。即便改成has，their的指代仍然错。A表达清晰不含歧义。

fighing

我明白了，A中把has emerged 提前是为了避免歧异

这里是patterns 和causes并列

如果写成a reasonably clear pictureof the patterns and causes of ocean currents has emerged

会让人误会成 picture of the patterns 和causes of ocean currents 一起emerge

xionghuixh

QUOTE:

以下是引用fighing在2009-10-20 6:48:00的发言：

我明白了，A中把has emerged 提前是为了避免歧异

这里是patterns 和causes并列

如果写成a reasonably clear pictureof the patterns and causes of ocean currents has emerged

会让人误会成 picture of the patterns 和causes of ocean currents 一起emerge

不同意。

不会误会的，是“has”不是“have”.

juningwer

New pictures have emerged of the Nokia 870 internet tablet which is an upgrade of the Nokia 770.

看来：emerge of 是习惯用法