全球多媒体网络的研究领域是安全性,下列描述错误的是______。A.用户可能需要屏蔽

题型:单项选择题

问题:

全球多媒体网络的研究领域是安全性,下列描述错误的是______。

A.用户可能需要屏蔽通信量模式

B.加密可能会妨碍协议转换

C.网络是共享资源,但用户的隐私应该加以保护

D.加密地点的选择无关紧要

考点:计算机等级考试网络技术计算机三级(网络技术)48
题型:单项选择题

阅读回答问题。

     People believe that climbing can do good to health. Where can you learn the skill of climbing then? If you

think that you have to go to the mountains to learn how to climb, you're wrong. Many Americans are learning

to climb in city gyms. Here, people are learning on special climbing walls. The climbing wall goes straight up

and has small holding places for hands and feet.

     How do people climb the wall? To climb, you need special shoes and a harness (保护带) around your chest

to hold you. There are ropes (绳索) tied to your harness. The ropes hold you in place so that you don't fall.

A beginner's wall is usually about 15 feet high, and you climb straight up. There are small pieces of metal that

stick out for you to stand on and hold on to. Sometimes it' s easy to see the new piece of metal. Sometimes,

it's not. The most difficult part is to control your fear. It's normal (正常的) for humans to be afraid of falling,

so it's difficult not to feel fear. But when you move away from the wall, the harness and the ropes hold you,

and you begin to feel safe. You move slowly until you reach the top. 

     Climbing attracts people because-it's good exercise for almost everyone. You use your whole body,

especially your arms and legs. This sport gives your body a complete workout. When you climb, both your

mind and your body can become stronger.

1. Do people have to go to the mountains to learn how to climb?

    ___________________________________________________________________________

2. Where are many Americans learning to climb?

    ___________________________________________________________________________

3. How can ropes help people in climbing? 

    ___________________________________________________________________________

4. What is the most difficult part for climbers in climbing?

    ___________________________________________________________________________

5. What is a good climber like?

    ___________________________________________________________________________

题型:单项选择题

施工企业在施工生产过程中能够多次使用,基本保持原有的实物形态并逐渐转移其价值的工具性材料是( )。

A.临时设施

B.周转材料

C.低值易耗品

D.库存材料

题型:单项选择题

建设项目( )是指项目总投资中的固定资产投资总额。

A.合同价
B.结算价
C.预算造价
D.总造价

题型:单项选择题

软件工程研究的内容主要包括______技术和软件工程管理。

题型:单项选择题

根据《民法通则》的有关规定,不列选项中,不属于无效民事行为的有( )。

A.不满十周岁的丫丫自己决定将压岁钱500元捐赠给希望工程

B.李某因认识上的错误为其儿子买回一双不能穿的鞋

C.甲企业的业务员黄某自己得到乙企业给予的回扣款1000元而代理甲企业向乙企业购买了10吨劣质煤

D.丙公司向丁公司转让一辆无牌照的走私车

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