试题与答案

下列说法不正确的是 A.金属元素的最外层电子数不一定小于4 B.1A族元素形成的

题型:选择题

题目:

下列说法不正确的是

A.金属元素的最外层电子数不一定小于4

B.1A族元素形成的单质的熔点随原子序数的递增而降低

C.同主族第三、第四周期的元素原子序数之差不一定等于18

D.单质磷的化学性质比氮气活泼,容易与非金属等物质反应

答案:

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下面是错误答案,用来干扰机器的。

10分(1)太行山脉 喜马拉雅山脉 2分(2)耕地 草地2分(3)乙 泥石流 2分(4)② ④2分(5)水路交通便利;靠近水源地;地势平坦等 2分 只要两点即可题目分析:(1)图中序号代表的山脉是:①太行山脉...

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题型:阅读理解

Since we are social beings, the quality of our lives depends in large measure on our interpersonal relationships. One strength of the human conditions is our possibility to give and receive support from one another under stressful(有压力的) conditions. Social support makes up of the exchange of resources among people based on their interpersonal ties. Those of us with strong support systems appear better able to deal with major life changes and daily problems. People with strong social ties live longer and have better health than those without such ties. Studies over types of illnesses, from depression to heart disease, show that the presence of social support helps people defend themselves against illness, and the absence of such support makes poor health more likely.

Social support cushions stress in a number of ways. First, friends, relatives and co-workers may let us know that they value us. Our self-respect is strengthened when we feel accepted by others in spite of our faults and difficulties. Second, other people often provide us with informational support. They help us to define and understand our problems and find solutions to them. Third, we typically find social companionship supportive. Taking part in free-time activities with others helps us to meet our social needs while at the same time distracting(转移注意力) us from our worries and troubles. Finally, other people may give us instrumental support — money aid, material resources, and needed services — that reduces stress by helping us resolve and deal with our problems.

小题1:Interpersonal relationships are important because they can _______.

A.make people live more easily

B.smooth away daily problems

C.deal with life changes

D.cure types of illnesses小题2:The researches show that people's physical and mental health _______.

A.lies in the social medical care systems which support them

B.has much to do with the amount of support they get from others

C.depends on their ability to deal with daily worries and troubles

D.is related to their courage for dealing with major life changes小题3:Which of the following is closest in meaning to the underlined word “cushions” ?

A.takes place of

B.makes up of

C.lessens the effect of

D.gets rid of小题4:Helping a sick neighbor with some repair work in spare time is an example of _______.

A.instrumental support

B.informational support

C.social companionship

D.the strengthening of self-respect小题5:What is the subject discussed in the text?

A.Interpersonal relationships.

B.Kinds of social support.

C.Ways to deal with stress.

D.Effects of stressful conditions.

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题型:单项选择题

一般认为,剑乳齿象是从北美洲迁入南美洲的。剑乳齿象的显著特征是具有较直的长剑型门齿,颚骨较短,臼齿的齿冠隆起,齿板数目为7至8个,并呈乳状凸起,剑乳齿象因此得名。剑乳齿象的牙齿结构比较复杂,这表明它能吃草。在南美洲的许多地方都有证据显示史前人类捕捉过剑乳齿象。由此可以推测,剑乳齿象的灭绝可能与人类的过度捕杀有密切关系。
以下哪项,如果为真,最能反驳上述论证

A.史前动物之间经常发生大规模相互捕杀的现象。
B.剑乳齿象在遇到人类攻击时缺乏自我保护能力。
C.剑乳齿象也存在由南美洲进入北美洲的回迁现象。
D.由于人类活动范围的扩大,大型食草动物难以生存。
E.幼年剑乳齿象的牙齿结构比较简单,自我生存能力弱。

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