gwd一道逻辑，b怎么选出来

smilegmat

The cause of the wreck of the ship Edmund Fitzgerald in a severe storm

on lake Superior is still unknown , when the sunken wreckage of the ves-

sel was round , searchers discovered the hull in two pieces lying close

together , The storm's violent waves would have caused separate pieces

floating even briefly on the surface to drift apart . Therefore . the breakup

of the null can be ruled out as the cause of the sinking .

Which of the following is an assumption on which the argument depends?

	Ships as large as the Edmund Fitzgerald rarely sink except in the most violent weather.
	Under water currents at the time of the storm did not move the sepa-rated pieces of the hull together again .
	Pieces of the hull would have sunk more quickly than the intact hull would have
	The waves of the storm were not violent enough to have caused the
	If the ship broke up before sinking , the pieces of the hull would not have remained on the surface for very long

答案是b, 题目说了些什么事，怎么做出来

yaoforeverlove

题目里的准确意思没查字典,不知道,但按我的理解,选B比较合理.

题目说cause未知，但是因为这个hull(null)变成两截但是距离很近，题中说，如果是这个原因引起的，那么“The storm's violent waves would have caused separate pieces floating even briefly on the surface to drift apart ”此处用了虚拟语气，所以事实相反，题中排出了这个原因。

问假设，这个可以利用 他因法 ，即排除其他能使hull 距离很近（除了原文中已经给出的）的原因，B就是那个其他原因。

jackiehuang

it says the waves caused by storms r violent enough to drift the separate pieces apart. so it's impossible that the two pieces consisting of the hull r lying closely unless the hull wasnt broken. but there is still one possibility that the hull was broken up and the underwater current put two pieces together. B excludes the possibility and it can be sure the breakup of the hull is not the cause of the sinking.