Question

【题目】阅读理解

There are lots of insects that farmers hate. But there also are some they like. They protect crops against damage from other insects. A good example is the lady beetle, which is also known as the ladybug(瓢虫)．
Lady beetles are a natural control for aphids(蚜虫). Lady beetles are red, orange or black. They often have black spots, though some have light colored spots. Different kinds of lady beetles have different numbers of spots. There are lady beetles with four, five, seven and fourteen spots.
Many of the well-known kinds of lady beetles come from Asia or Europe. They now are common throughout the United States.
American scientists imported one kind of lady beetle, the multicolored Asian lady beetle, as early as 1916. They released them as an attempt to control some kinds of insects. Over the years, the beetle has become established, possibly helped by some that arrived with imported plants on ships.
Experts say over 450 kinds of lady beetles are found in North America. Some are native to the area. Others have been brought from other places. Almost all are helpful to farmers.
The Asian lady beetles now in the United States probably came from Japan. The Asian lady beetle eats aphids that damage crops like soybeans, fruits and berries.
In the southern United States, Asian lady beetles have reduced the need for farmers to use reskilling poisons on pecan trees. This popular tree nut suffers from aphids and other pests that the lady beetles eat.
But some people say the Asian lady beetle has itself become a pest. They worry that the lady beetles may eat their late autumn fruit crops.
Experts say Asian lady beetles may appear in large numbers in some years. But they say the insects are too helpful to be considered as pests.
（1）What do ladybugs look like?
A.All kinds of ladybugs are of the same color.
B.Most of them are red, orange or black.
C.They each have the same number of spots on them.
D.Most of them have fourteen spots.
（2）Asian ladybugs have been in the United States for______.
A.nine decades
B.hundreds of years
C.half a century
D.a century
（3）According to the passage the following statements are supported EXCEPT________.
A.there are more than 450 kinds of ladybugs in North America, including native ones
B.only some imported ladybugs are helpful to the local plants
C.soybeans, fruits and berries are favorites of aphids.
D.pecan trees are common in the south of America
（4）According to the experts, ladybugs are________.
A.more helpful than considered as pets
B.more pests than helpful insects
C.helpful as well as destructive
D.are more destructive than helpful

Answer 1

【答案】
（1）B
（2）A
（3）B
（4）A
【解析】本文是一篇说明文，瓢虫是一种益大于弊的昆虫，不应被视为害虫。但有些人不这样认为。
（1）考查细节理解。根据第二段中的“Lady beetles are red, orange or black.”可知B项正确，故选B。
（2）考查推理判断。根据第四段中的“ American scientists imported one kind of lady beetle, the multicolored Asian lady beetle, as early as 1916. ”可知自1916年至今应为90多年，但离一个世纪还有好几年，所以选A。
（3）考查细节理解。根据第五段中的“ Almost all are helpful to farmers.”可知选B。
（4）考查细节理解，根据最后一段中的“ But they say the insects are too helpful to be considered as pests.”可知，专家的观点是瓢虫益大于弊，不应被视为害虫。故选A。