9月group 1 问题讨论贴

sicivi

以下是引用rattledrum在2008-8-23 12:12:00的发言：

原来PP3就是PREP - -0

一个ETS版本，老的，另一个2006年后GMAC的版本而已。。。才搞清楚

何谓“一个。。。另一个。。。？”

rattledrum

以下是引用sicivi在2008-8-23 12:57:00的发言：

何谓“一个。。。另一个。。。？”

即：one... the other...

 

反正你就做你在官网上下载的那个好了。

sicivi

我们的帖子沉到了第三页，不是个好现象赫赫

顶上来！大家多多提问！多多解答！！

caojie8182

哦,知道了,原来叫大全简注, 我找的是全解, 名字不对...
发现语法真的是越沉下去学问越多, 门门都是博达精深...

rattledrum

16. The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life.

(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.

(C) Any planet with a stable, moderate axis tilt can support life.

(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.

(E) No planet that has more than one moon can support life.

我选对了，是B。

可是觉得A好像也对哦。

[此贴子已经被作者于2008-8-26 0:09:20编辑过]

sicivi

以下是引用rattledrum在2008-8-26 0:09:00的发言：

16. The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life.

(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.

(C) Any planet with a stable, moderate axis tilt can support life.

(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.

(E) No planet that has more than one moon can support life.

我选对了，是B。

可是觉得A好像也对哦。

这是一个充分必要的问题
moon的存在是个必要条件，但是不是充分条件
说不定Mars上还有很多方面不满足support life的条件

rattledrum

这题搞懂了！

lazzycat_wxh

同充分必要条件

rattledrum

feifei test2-23

23. On a certain day, nine scheduled flights on Swift Airlines were canceled. Ordinarily, a cancellation is due to mechanical problems with the airplane scheduled for a certain flight. However, since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, some of the nine cancellations were probably due to something else.

The argument depends on which one of the following assumptions?

 

A.        More than one or two airplanes were scheduled for the nine canceled flights.

B.        Swift Airlines has fewer mechanical problems than do other airlines of the same size.

C.        Each of the canceled flights would have been longer than the average flight on Swift Airlines.

D.       Swift Airlines had never before canceled more than one or two scheduled flights on a single day.

E.        All of the airplanes scheduled for the canceled flights are based at the same airport.

 

参考答案：A 采用取非法。

思路：否定More than one or two airplanes were scheduled for the nine canceled flights.将削弱作者的结论。
                    

 

A：取非削弱

B：无关。

C：无关。

D：无关。

E：无关。

不是很理解。

题目说了nine scheduled flight on SA were canceled，也就是说这9架飞机都是were scheduled，而不是其他were not scheduled。

答案A，more than 1 or 2 airplanes were scheduled for the 9 canceled flights，强调这9架被取消的飞机里多于1-2架的是were scheduled，这不是重复前提吗！有什么意义，干嘛说答案A是assumption？？？

rattledrum

虽然取非确实削弱原文，可是明显取非了就把前提给废了，这不是有毛病嘛！

各位，帮忙解决一下。我晕啊～～～～～～～

谢谢！！！