数据2、3、5、3、4、6的众数为x,中位数为y,则x-y=______.

题型:填空题

问题:

数据2、3、5、3、4、6的众数为x,中位数为y,则x-y=______.

考点:中位数和众数
题型:填空题

In many countries today, laws protect wildlife. In India, the need for such protection was realized centuries ago.

About 300 B.C. an Indian writer described forest that were somewhat like national parks today. The killing of game beasts was carefully supervised(监视). Some animals were fully protected.Within the forest, nobody was allowed to cut timber(wood for building), burn wood for charcoal(炭), or catch animals for their furs. Animals that became dangerous to human visitors were caught or killed outside the park so that other animals would not become uneasy.

The need for wildlife protection is greater now than ever before. About a thousand species of animals are in danger of extinction, and the rate of extinction was about one species every fifty years from A.D. 1 to 1800, but now it is about one species every year. Everywhere, men are trying to solve the problem of protecting wildlife caring for the rapid growth of the world’s population.

小题1: In forest of ancient India __________.

A.people were permitted to hunt for fun

B.only few kinds of animals could be killed

C.the killing of game beasts was strictly limited

D.no killing of beasts was allowed.小题2:Dangerous animals were caught or killed outside the park so as to __________.

A.keep human visitors safe

B.free the rest of the animals from worry or fear

C.both A and B

D.supply other animals with more food小题3:The underlined word “extinction” probably means __________.

A.being hungry

B.dying out

C.growing slowly

D.being killed小题4:The example of man’s connection with wildlife protection can date back to _______.

A. the third century            B. more than 2000 years ago

C. A. D. 1 to 1800            D. over 300 years ago

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4-硝基联苯

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不能检查酸式滴定管漏水的方法是()。

A.凡士林是否呈透明状态

B.刻线上的液面是否下降

C.滴定管下端有无水滴滴下

D.活塞隙缝中有无渗水

题型:填空题

下列结构属于肾皮质的是()。

A.肾筋膜

B.肾柱

C.肾锥体

D.肾 * *

E.肾叶

题型:填空题

简述人际关系的基本规律。

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