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What is the main idea of the news item?
What is the main idea of the news item?
admin
2014-08-13
4
问题
What is the main idea of the news item?
American scientists say many tropical insects could face extinction by the end of this century unless they adapt to predict rising temperatures. They say climate change in the tropics could have secondary effects on plant pollination and food supplies. Here’s our science correspondent Christine McGourty. The researchers studied data on dozens of insect species from around the world, looking at temperature changes between 1950 and 1990, and how the insects were affected The aim was to predict how they’d cope in the late 21st century, if temperatures increase as many scientists predict The results show that insects in countries at higher latitudes, in Britain, for example, should cope best But the impact could be far worse in the tropics where insects are more sensitive to even small temperature changes.
选项
A、Tropical insects might not survive temperature changes.
B、Insects living in countries at higher attitudes could all die out.
C、Insects could not adapt themselves to the rising temperatures.
D、Insects’ food supplies could be affected by the rising temperatures.
答案
A
解析
主旨题。本题需对新闻的大意进行概括。根据新闻开头可知,美国科学家认为很多热带昆虫如果不能适应不断升高的气温就会面临灭绝。所以A正确。新闻开头段第一句话通常是新闻的主旨.抓住开头部分就能回答这类题。
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