ChaseDream

标题: gwd-7-21 [打印本页]

作者: yangtingno1 时间: 2004-9-10 16:53
标题: gwd-7-21

Q21:

Which of the following most logically completes the passage?

Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

large moths are generally able to maneuver better in flight than smaller moths

large moths are proportionally much more common in warm climates than in cool climates

small moths are more likely than large moths to be effectively camouflaged while on vegetation

large moths typically have wings that are larger in proportion to their body size than smaller moths do

most predators of moths prey not only on several different species of moth but also on various species of other insects

作者: LES 时间: 2004-9-10 17:08

以下是引用yangtingno1在2004-9-10 16:53:00的发言：
Q21:Which of the following most logically completes the passage?

Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

B. large moths are proportionally much more common in warm climates than in cool climates

１.气温与体温match　－>　有效飞行；
２.当气温　<<　体温　－>　不能有效飞行，且易被捕食；

３.大娥比小娥飞得快　－>　大娥逃生能力强；

４.大娥的最佳体温　>>　小娥的；

－> 大娥需要相应的比较高的气温环境，以保证他们的有效飞行，所以推出B选项，大娥通常在暖温气候地区。

作者: apple01 时间: 2004-10-11 06:42
And also in cool climates, larger moths have to stay on vegetation for more time than small moths, increasing the risk of being predated. Thus, larger moths are less common in cool climates.

作者: zhaoshujuanw 时间: 2005-1-12 05:30
LES did good job.I wish I could like you one day. and thank you

作者: ethyl 时间: 2005-5-23 20:31

also in cool climates, larger moths have to stay on vegetation for more time than small moths, increasing the risk of being predated. Thus, larger moths are less common in cool climates.

赞，非常好，ETS绕弯啦

作者: xinfaxian 时间: 2005-6-4 00:52

以下是引用ethyl在2005-5-23 20:31:00的发言：

ETS绕弯啦

同意，这道题目绕了一个弯，当中增加了一层assumption-"becasue big moths cannot survive better in cooler places",所以explains了相对它们在warmer的地方较多。

ETS 够阴的，这题在real test肯定让偶跌跟头。。。

作者: afcyrus 时间: 2005-7-4 15:13
麻烦NN解释一下为什么C错了，我第一感觉也是B的，但后来看到B有新名词temperature,就选C了

作者: foreinter 时间: 2005-8-24 17:40
没注意体温和空气温度的区别，晕。

作者: amy9301 时间: 2005-12-7 21:28

作者: steveyangxt 时间: 2005-12-13 10:43

以下是引用apple01在2004-10-11 6:42:00的发言：
And also in cool climates, larger moths have to stay on vegetation for more time than small moths, increasing the risk of being predated. Thus, larger moths are less common in cool climates.

对，寒冷地区的大蛾子造就死悄悄了赫赫

作者: urchinwang 时间: 2005-12-20 15:47

我觉得这个题目的答案很有问题：

既然大蛾子体温高，比如10度，那么比如温度到5度它就已经不动了，可能会被吃；而小蛾子体温本来就是5度，降到0度才会不动；所以在温暖的地方，大蛾子应该少啊，因为从上面看出，大蛾子对外面温度的要求高于小蛾子，温度到达某个点的时候，大蛾子不动了，小蛾子还是照样动啊！！

作者: 顾风 时间: 2006-6-9 17:36
楼上显然钻牛角尖了。。。

作者: camelhill 时间: 2006-7-10 21:41

以下是引用urchinwang在2005-12-20 15:47:00的发言：

我觉得这个题目的答案很有问题：

我也是这么认为的。

作者: windspeaker 时间: 2006-12-31 11:56

以下是引用ethyl在2005-5-23 20:31:00的发言：

also in cool climates, larger moths have to stay on vegetation for more time than small moths, increasing the risk of being predated. Thus, larger moths are less common in cool climates.

赞，非常好，ETS绕弯啦

太卑鄙了

作者: gonghao 时间: 2007-1-1 22:43

不要想的太复杂

读2遍选项还是比的出选项的

DE排除A错在BC之间比较

C不合适

只能选B

大虫子不飞就被吃，那么怎么样能飞呢？温度高点就能飞。

作者: tonyyuan 时间: 2007-2-4 17:20

当然从气温和体温的关系可以判断出：当温度低于larger moth体温而高于small moth体温的时候small moth的活动性更强，但是文章又说In general, larger moths can fly faster than smaller ones,这个in general是不是在否定前面的说法？这个in general指的是什么时候？是气温既高于samll又高于larger的时候吗？

作者: lloottuuss 时间: 2007-6-25 22:30

此题出的很弱，却反而让人绕住了。

ETS的思路是在温暖地区，因为大蛾子和小蛾子都活跃，大蛾子飞的快，所以活下来的多；在寒冷地区，因为大蛾子歇了，更容易被捕食，所以活下来的少。ETS自认为这样充分利用了所有信息来推出结论。实际上，仅从适宜温度上就能推出——大蛾子既然自身适宜温度高，当然更多在温暖地区生活，更少在寒冷地区生活，否则不是自己找不痛快嘛。因此根本不再需要其他信息来进行推论。

郁闷的是，正因为B这么简单，我反而把B当成无关选项排除了……

[此贴子已经被作者于2007-6-25 22:31:55编辑过]

作者: RichardTian 时间: 2007-9-29 09:04
楼上说的简直就是无招胜有招，大娥子们自己也知道周围气温高点舒服，没啥别的原因的话，这些大娥子们就结伴飞到高温区生活了，反正没有移民限制，要不然在一个不适宜娥类居住的地方住着，就是跟自己过不去嘛。
这是顺应天理的事情，哈哈
要是美国放开了移民，估计大家早就结伴飞过去了，一个道理。

不过看了LES和gonghao两位的解释，很佩服其思路的清晰。受教了！

作者: yangxuemei0111 时间: 2007-10-20 03:22

以下是引用RichardTian在2007-9-29 9:04:00的发言：
楼上说的简直就是无招胜有招，大娥子们自己也知道周围气温高点舒服，没啥别的原因的话，这些大娥子们就结伴飞到高温区生活了，反正没有移民限制，要不然在一个不适宜娥类居住的地方住着，就是跟自己过不去嘛。
这是顺应天理的事情，哈哈
要是美国放开了移民，估计大家早就结伴飞过去了，一个道理。

不过看了LES和gonghao两位的解释，很佩服其思路的清晰。受教了！

JIng dian!!!!

easy to understand!

作者: rockmax 时间: 2008-7-31 23:13

厉害, 看了半天没有看明白,

还是N人一语道破天机.

作者: nerakuhs 时间: 2009-1-14 22:28

以下是引用gonghao在2007-1-1 22:43:00的发言：