Question

As they migrate, butterflies and moths choose the winds they want to fly with, and they change their body positions if they start floating in the wrong direction. This new finding suggests that insects may use some of the same methods that birds use for traveling long distances. Scientists have long thought that insects were simply at the mercy of the wind.
Fascinating as their skills of flight are, migrating behavior has been difficult to study in insects because many long distant trips happen thousands of feet above ground. Only recently have scientists developed technologies that can detect such little creatures at such great heights.
To their surprise, though, the insects weren't passive travelers on the winds. In autumn, for example, most light winds blew from the east, but the insects somehow sought out ones that carried them south and they positioned themselves to navigate directly to their wintering homes.
Even in the spring, when most winds flowed northward, the insects didn't always go with the flow. If breezes weren't blowing in the exact direction they wanted to go, the insects changed their body positions to compensate(補償, 彌補). Many migrating birds do the same thing.
The study also found that butterflies and moths actively flew within the air streams that pushed them along. By adding flight speeds to wind speeds, the scientists calculated that butterflies and moths can travel as fast as 100 kilometers an hour. The findings may have real-world applications. With climate warming, migrating insects are growing in number. Knowing how and when these pests move could help farmers decide when to spray their crops.
小題1:What's the main idea of the text?

A．Insects migrate with the seasons.

B．The wind helps insects greatly in migrating.

C．Windsurfing insects have real direction.

D．Scientists have trouble in observing insects.

小題2:Scientists originally thought that _____.

A．insects always waited for their favorable winds

B．insects chose the winds they wanted to ride

C．insects were just blown about by the wind

D．insects positioned themselves in the winds

小題3:It is not easy to study the migrating behavior of the insects because ______.

A．the little creatures can fly very fast

B．their flight is long and high above ground

C．the wind's direction is hard to forecast

D．they have no regular migrating courses

小題4:According to the passage, the findings can ____

A．increase insects in number

B．instruct farmers when to spray their crops

C．prevent climate warming

D．help protect insects

Answer 1

小題1:C
小題2:C
小題3:B
小題4:B

試題分析：本文講述的科學家最近飛行蝴蝶和飛蛾在飛行的時候，并不是仍由大風吹來吹去，而是能夠控制自己的飛行的方向和距離。這一研究結果有助于人們保護自己的作物。
小題1:C 主旨大意題。根據文章第一段前4行As they migrate, butterflies and moths choose the winds they want to fly with, and they change their body positions if they start floating in the wrong direction. This new finding suggests that insects may use some of the same methods that birds use for traveling long distances.可知蝴蝶這些動物實際上有很強的控制自己的身體的能力，并不是沒有方向感，任由風吹亂飛的。故C正確。
小題2:C 細節題。根據第一段最后一句Scientists have long thought that insects were simply at the mercy of the wind.可知科學家原來因為蝴蝶是仍由大風吹來吹去的。故C正確。
小題3:B 細節題。根據文章第二段Fascinating as their skills of flight are, migrating behavior has been difficult to study in insects because many long distant trips happen thousands of feet above ground. Only recently have scientists developed technologies that can detect such little creatures at such great heights.可知這樣的動物飛行得又高又遠，這給科學家的研究帶來了很大的困難。故B正確。
小題4:B 細節題。根據文章最后一句With climate warming, migrating insects are growing in number. Knowing how and when these pests move could help farmers decide when to spray their crops有助于農民們知道何時來保護自己的作物。可知B正確。
點評：本文講述的科學家最近飛行蝴蝶和飛蛾在飛行的時候，并不是仍由大風吹來吹去，而是能夠控制自己的飛行的方向和距離。這一研究結果有助于人們保護自己的作物。本文屬于科普類短文，此類文章的最大的障礙是詞匯以及考生對閱讀內容的不熟悉，需要考生在閱讀的時候有足夠的耐心。要養成在上下文串聯中猜測詞義的能力，根據上下文中出現的同義詞，近義詞，反義詞，以及詞義的解釋來理解生詞。同時要抓住文章的中心，不要受其他信息的影響。要根據題目及選項以及文章的上下文串聯合理的判斷推理。