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【简答题】

It can be hard to feel much sympathy for bats. Like snakes or spiders or sharks, there’s something quite alarming about bats, something that holds back empathy. Bats aren’t actually,“flying rodents(啮齿动物),” but you likely won’t see them on the next enered species poster.But bats in the U.S. are in serious trouble, thanks largely to a catastrophic disease called white-nose syndrome (WNS), which has killed at least one million bats, mostly in the northeast, and death rates among some affected winter colonies can be as high as 70%. One species—the little brown bat or Myotis lucifugus—has declined so quickly that it is headed for extinction. And the disease keeps spreading, with wildlife experts helpless to stop it—after starting in upstate New York in 2006, the disease was just confirmed as far west as Ohio yesterday.You might say: so what? Other than people who study bats—would anyone miss them when they’re gone? As it turns out, all of us would—at least if you like food. A new article in Science shows that bats have an important role to play in agriculture—one worth at least $3.7 billion a year, if not far more. That’s how much the extinction of bats throughout North America could cost the region’s food system, according to an ysis by a group of researchers led by Justin Boyles of the University of Pretoria in South Africa. The logic is : bats eat bugs—tons and tons of bugs—and that includes crop and forests pests. (A single colony of 150 brown bats in Indianan has been estimated to eat nearly 1.3 million pest insects a year.) Remove the bats, and you remove one of nature’s most effective biological pesticides—which would have to be replaced by actual pesticides, at an economic and environmental expense.
It’s not just WNS that is striking down bats. Wind turbines(涡轮机)are apparently killing migratory(迁徙的)bats as well—by 2020, an estimated 33,000 to 111,000 bats are predicted to be killed by turbines in the mid-Atlantic Highlands alone. The authors in the Science paper worry that as wind power develop fast in the U.S., more bats will end up killed by the blades. But WNS seems like the more immediate threat. But it’s still a mystery how WNS spread, and how to stop it—those the U.S. Fish and Wildlife Service, among other government agencies, is on the case. We may not like bats—but we definitely need them.
43. What is the author’s opinion about bats?
A. Indifference
B. Frightened
C. Worried
D. Grateful
44. Which of the following statements is true about WNS?
A. It speads quickly
B. It can be controlled.
C. It was first discovered in Ohio.
D. It is more serious in the Northwest.
45. From Justin Boyles’ study we can learn that _____.
A. bats often eat insects killed pesticides
B. bats in North America are short of food
C. some species of bats harm crop plants
D. losing bats means huge economic cost
46. What is the author’s purpose of writing this passage?
A. To show his opinion of bats.
B. To show how impotant bats are in agriculture.
C. To tell us a rare animal.
D. To report a new science discovery.

题目标签:啮齿动物迁徙
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举一反三

【单选题】“迁徙”和“旅行”共同的外部特征是( )。

A.
都是空间移动
B.
都是自然行为
C.
都是自由行为
D.
都是非功利性的

【单选题】迁徙与旅行、旅游共同的外部特征是( )

A.
自然行为
B.
自由行为
C.
空间移动
D.
享乐行为

【多选题】关于影片《迁徙的鸟》描述正确的有?

A.
是一部数字纪录影片
B.
2004 中法文化交流年”展示的第一部法国经典影片
C.
主题歌《在你身边》(To Be ByYour Side)
D.
在香港它被称作《鸟与梦飞行》

【单选题】签署《印第安人迁徙法案》的美国总统是( )。

A.
乔治 华盛顿
B.
本杰明 富兰克林
C.
安德鲁 杰克逊
D.
亚伯拉罕 林肯

【单选题】()恐怖组织积极鼓吹开展“迁徙圣战”。

A.
“瓦哈比教派”
B.
“伊扎布特”
C.
“伊吉拉特”
D.
“吉哈德”