单选题
A strong wind can be a dangerous thing—sometimes it is
powerful enough to knock you down. But to some plants, the wind is a source (来源)
of new life, carrying them or their spores (孢子) thousands of miles.
A NASA satellite called QuikSCAT has discovered highways of wind over the Earth's oceans. Scientists believe these invisible roads may explain why many nonflowering plants grow where they do.
The satellite is able to send microwaves (微波) from space to the surface of the ocean. The pattern of signals (信号) that come back shows which way the winds are blowing.
Using this {{U}}data{{/U}}, the scientists studied a group of islands in the southern hemisphere (半球), near Antarctica. Winds tend to blow anticlockwise (逆时针) in this area, but there are lots of local differences.
When the researchers compared these local patterns to botanical (植物学) data, they found that the wind had an important effect on where species (品种) of mosses (苔), lichens (地衣), and other nonflowering plants grow.
For example, Bouvet Island and Heard Island share 30 percent of their moss species, 29 percent of liverworts (叶苔), and 32 percent of lichens—even though they are 4,430 kilometers apart. However Gough Island and Bouvet Island, separated by just 1,860 kilometers of sea, share only 16 percent of mosses and 17 percent of liverworts. They have no lichens in common.
Ferns (蕨类植物) and flowering plants don't travel as well in the wind, so they don't show the same kinds of distribution (分布) patterns.
A NASA satellite called QuikSCAT has discovered highways of wind over the Earth's oceans. Scientists believe these invisible roads may explain why many nonflowering plants grow where they do.
The satellite is able to send microwaves (微波) from space to the surface of the ocean. The pattern of signals (信号) that come back shows which way the winds are blowing.
Using this {{U}}data{{/U}}, the scientists studied a group of islands in the southern hemisphere (半球), near Antarctica. Winds tend to blow anticlockwise (逆时针) in this area, but there are lots of local differences.
When the researchers compared these local patterns to botanical (植物学) data, they found that the wind had an important effect on where species (品种) of mosses (苔), lichens (地衣), and other nonflowering plants grow.
For example, Bouvet Island and Heard Island share 30 percent of their moss species, 29 percent of liverworts (叶苔), and 32 percent of lichens—even though they are 4,430 kilometers apart. However Gough Island and Bouvet Island, separated by just 1,860 kilometers of sea, share only 16 percent of mosses and 17 percent of liverworts. They have no lichens in common.
Ferns (蕨类植物) and flowering plants don't travel as well in the wind, so they don't show the same kinds of distribution (分布) patterns.
单选题
This passage is about ______.
【正确答案】
B
【答案解析】[解析] 主旨题。题干意为“文章是关于会么的?”通读全文我们知道，文章主要介绍了海风的一种功能，即许多不开花的植物通过海风播种。因此本题的正确答案为B。
单选题
The underlined word "data" (line 1, para.4) means ______.
【正确答案】
A
【答案解析】[解析] 语义题。题干意为“第四段第一行划线单词‘data’的意思是______。”从文章上下文可知，“data”指的是卫星发回的信息。所以本题的正确答案为A。
单选题
Which of the following is NOT true?
【正确答案】
B
【答案解析】[解析] 细节题。题干意为“下面哪个陈述是不正确的?”从文章中第四段第二句话“Winds tend to blow anticlockwise in this area, but there are lots of local differences.”可知，这个地区的风大部分是按逆时针方向吹的，但是还有许多局部的差异。所以选项B“这个地区的风都是按逆时针方向吹的。”不正确，因此本题的正确答案为B。
单选题
Which of the following picture shows the correct position of the islands?
A. 
B. 
C. 
D. 
B.
C.
D.
【正确答案】
D
【答案解析】[解析] 推断题。题干意为“下面哪个图表明了岛屿的正确位置?”根据第四段和第六段的内容可判断出本题的正确答案为D。