操作高压电气设备主回路时,操作人员必须带绝缘手套,并穿()或站在()上。

题型:填空题

问题:

操作高压电气设备主回路时,操作人员必须带绝缘手套,并穿()或站在()上。

考点:矿井机电维修工矿井机电维修工题库
题型:填空题

B

Save the Animals

Animals are natural resources that people have wasted all through our history.

Animals have been killed for their fur and feathers(羽毛), for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the earth forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger.

Why should people care? Because we need animals. And because once they are gone, there will never be any more.

Animals are more than just beautiful or interesting. They are more than just a source of food. Every animal has its place in the balance of nature. Destroying one kind of animal can create many problems.

For example, when farmers killed large numbers of hawks (鹰), the farmers’ stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied (繁殖) quickly.

Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger.

Quite a few countries have passed laws. These laws prohibit the killing of any animal or plant on the danger list.

61. Animals are important to us mainly because __________.

A . they give us a source of food             B. they are beautiful and lovely

C. they keep the balance of nature            D. they give us a lot of pleasure

62. What has happened to the animals on the earth?

A. About 170 kinds of animals have disappeared forever.

B. Thousands of kinds of animals are gone forever.

C. A few kinds of animals have died out.

D. All kinds of animals are in danger.

63. Why do people kill animals?

A. They kill animals for something they need.

B. They kill animals to raise some money.

C. Animals destroy their natural resources.

D. Animals create many problems.

64. What does the underlined word “prohibit” mean in the last paragraph?

A. prevent           B. stop              C. forbid            D. allow

65. What can we infer(推断) from the fact that quite a few countries have passed laws protecting animals in danger?

A. Animals in danger will be kept away from people.

B. Animals in danger will not be killed any more.

C. The number of some animals in danger will increase.

D. Every person will know the importance of protecting wild animals.

题型:填空题

关于总体和样本,下列说法中不正确的是()。

A.总体是根据研究目的确定的

B.总体均为同质

C.总体是所有观察单位的所有变量值的集合

D.样本是从总体中随机抽取的

E.可以用样本信息推断总体特征

题型:填空题

下列哪项不是甲状腺 * * 状癌的常见特征()

A.约占成人甲状腺癌的60%

B.占儿童甲状腺癌的全部

C.肿瘤大部分为单发病灶

D.可较早出现颈淋巴结转移

E.术后五年治愈率可达90%

题型:填空题

再生障碍性贫血免疫抑制剂治疗的药物包括___________、___________、___________。

题型:填空题

罗杰斯认为,不能促进个体成长的氛围形成的是()

A.共情

B.接纳

C.无条件积极关注

D.指导

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