如果风是造成沙尘暴的主要原因,那么顺理成章的是,只要是在干燥的环境条件下每一次大风都

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问题:

如果风是造成沙尘暴的主要原因,那么顺理成章的是,只要是在干燥的环境条件下每一次大风都会形成沙尘暴,而且风力愈大,扬尘愈多。然而尽人皆知的是,事实并非如此。即便是在同样干燥的条件下,多数风力很大,甚至七、八级的大风,扬尘并不大。而较强的沙尘暴时,风力有时也并不大。
下列说法与原文相符的是( )。

A.风力和沙尘暴的形成没有直接关系
B.沙尘暴日趋加剧主要归罪于人类对植被的破坏
C.沙尘暴的形成要素除了风和干燥环境之外,可能还有别的因素
D.沙漠中一年四季都处在干燥期,故其形成沙尘暴的频率最高

考点:大学生村官村官笔试村官行政职业能力测验
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Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possible problems with social networking sites and the teenagers who use them.

Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicate with others who share the same interests and to get helpful advice on ongoing projects.

Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.

A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It’s easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.

Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.

Therefore, it’s very important to make sure teens are safe when they use social networks.

Many of the same rules that work for online chat work for these sites:

※Don’t use your real name.

※ Don’t give out personal information to people you don’t know. A last name and a town

are enough for a bad guy to find where you are.

※ Don’t believe that people are who they say to be.

※ Immediately end any communication that makes you uncomfortable and report it to a

parent.

Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn’t mean you are unable to do anything but wiser than many others.                                             

小题1:How many dangers of using social networks are mentioned in the passage?

A.2.

B.3.

C.4.

D.5.小题2:The writer takes MySpace as an example to show that ________.

A.students could be put into unreal situations on the Internet

B.teenagers are facing unknown dangers on the social networks

C.Internet provides more social websites to American teenagers

D.social networks are very popular among teenagers in America小题3:We can infer from the passage that ________.

A.the dangers are similar when chatting online and surfing social networks

B.more than half American teenagers aged from 12 to 17 use social networks

C.teens who ask for help are wiser when meeting problems on social networks

D.there are more disadvantages than advantages for teens to use social networks

题型:单项选择题

下列关于俄亥俄模式的描述错误的有()。

A.包括关心人和工作管理两个维度

B.包括员工取向与工作取向两个维度

C.员工取向的领导者关注人际关系,主动了解并积极满足员工需要

D.高度工作取向的领导者关注员工工作,要求维持一定的绩效水平,强调工作的最后期限

E.高度人际取向的领导者帮助下属解决个人问题,公平对待下属的健康、地位和满意度

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患者,男,48岁。因患肝硬化5年,近1年来明显腹胀,尿少,食欲下降,下肢水肿来院。查体:一般情况差,腹膨隆,可见腹壁静脉曲张,移动性浊音阳性。

对该患者的可能诊断是

A.上消化道穿孔

B.急性胆囊炎

C.急性胰腺炎

D.急性胆管炎

题型:单项选择题

实质渊源

题型:单项选择题

采血量应严格控制在标示量的多少范围内?()

A.±5%

B.±10%

C.±20%

D.±30%

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