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标题: 请教gwd-30-20 [打印本页]

作者: scotfield 时间: 2007-11-12 16:22
标题: 请教gwd-30-20

Q20:

Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

of which type there are 200,000 worldwide, can interfere with pacemakers and that
of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and
of which type there are 200,000 worldwide, they can interfere with pacemakers and
200,000 of which type exist worldwide, interfering with pacemakers, and
200,000 of that type existing worldwide and can interfere with pacemakers, and

答案是D 我选的是A 请帮忙指点谢谢！～～～ ^.^

作者: zsgc0011 时间: 2008-2-20 14:39

同问 D结构好复杂我看不出谓语动词``

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