问题 单项选择题 A2型题

某医生收集10例某病病人,记录了患者在抢救期间的总胆固醇,用爱丁堡-斯堪的纳维亚神经病学卒中SNSS量表评定患者的神经功能缺损程度,已知量表评分呈偏态分布。若要分析总胆固醇与神经功能评分间的相关性,宜用()

A.积差相关系数

B.等级相关系数

C.直线回归系数

D.决定系数

E.截距

答案

参考答案:B

阅读理解

Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big, and they can eat small animals. One famous meat-eating plant is the Venus flytrap(捕蝇草).

The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly(苍蝇) touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.

Why do plants do it? Most plants get what they need from the sun, the air and the ground. In some places, the ground is very poor. It doesn’t have all these important things, especially nitrogen(氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let’s hope that some of the bigger plants don’t get the same idea!

根据短文内容,选择正确的答案(每小题2分,共10分)

小题1:The Venus flytrap is a kind of      .

A.plant

B.animal

C.food

D.meat小题2:The Venus flytrap grows in      .

A.most parts of the world

B.some parts of Africa

C.dry parts of the United States

D.wet parts of England小题3:From the passage, we learn that     .

A.all plants can eat people

B.all plants can eat animals

C.some plants can eat people

D.many plants can eat animals小题4:The underlined word “presses” probably means       in Chinese.

A.挤压

B.关上

C.打开

D.松开小题5:Why do some plants eat animal meat? Because     .

A.plants are dangerous to animals

B.animals are dangerous to plants

C.plants want to get what they need from animal meat

D.Plants want to protect themselves against animals

单项选择题 A1型题