将文档的一部分文本内容复制到别处,首先要进行的操作是()。A、粘贴 B、复制 C、剪贴D

题型:单项选择题

问题:

将文档的一部分文本内容复制到别处,首先要进行的操作是()。

A、粘贴

B、复制

C、剪贴

D、选定

考点:计算机操作系统计算机操作系统题库
题型:单项选择题

阅读理解。

     For some reason, Mr Robinson worked in South Africa(非洲). His son was born there. His name was John.

     One winter Mr and Mrs Robinson went to England, and they took John there.John was seven years old then.

     One day it snowed. The boy went into the garden, and he played in the snow. He said, "Snow is very

beautiful, but it is very cold.“Then he said, "What is this? It is a big, round piece of glass. It is beautiful but

it is very cold, too.”

     But it was not glass. It was ice. It was on a bucket(桶)of water. John said, "Who put this glass here?I

am going to take it into the house.”He took the ice to his father and said,  "This is a beautiful piece of glass, but it is very cold and wet.  It was on a bucket of water in the garden.”Mr Robinson smiled and said,"Take it to the kitchen(厨房), put it in front of the stove(炉子)there, and dry(弄干)it."

     The boy took the ice to the kitchen and put it in front of the stove. He dried(弄干)his hands, because

they were very cold and wet, and then he went to the ice again. He looked at“,and then he took it to his

father again.  He said,"I put this glass in front of the stove, but it does not get drier.It becomes wetter and

smaller."

1. John didn't know what the ice was because_____.

A. he was very foolish

B.he was young

C. he was born in Africa

D.he didn't go to school

2. One winter Mr and Mrs Robinson went to England with_____.

A. their son

B.a boy of their friends

C. their daughter

D.one of their friend's sons

3. One day John found_____on a bucket of water.

A.a piece of glass

B.a piece of ice

C. some snow

D.some water

4. What clid Mr Robinson ask John to do?

A. He asked John to take the ice out.

B. He asked John to put the ice in front of the stove.

C. He asked John not to play with ice.

D. He askecl John to dry his hancls at once.

5.After John put the ice in front of the stove, he found that it became_____

A. drier

B.wetter

C.bigger

D.colder

题型:单项选择题

下图为我国某地河流实测流量(M2/s)和降水量(mm),据此完成21—22题。

小题1:从甲图可以看出,该地区暴雨(24小时雨量超过50mm)出现较多。这里暴雨形成的原因主要是              (   )

A.空气对流活动强

B.受地形阻挡,焚风效应强

C.台风活动

D.赤道低压控制,对流旺盛小题2:乙图反映了该河流8月中旬的一次降水与径流的变化过程,最大降水与最大流量之间有一个时间差,近年观测发现这个时间差逐年变大,这可能是由于 (   )

A.全球气候变暖

B.流域内种草种树,植被覆盖率提高

C.水土流失日益严重

D.退耕还沼和退耕还湖效果显著

题型:单项选择题

我国危害最大的三种自然灾害是:()

A、洪水 

B、干旱 

C、地震 

D、沙尘暴

题型:单项选择题

在倾角为30°的斜面顶点以10m/s的速度水平抛出一个质量为0.1kg的小球,则小球落到斜面上瞬间重力的瞬时功率为______,过程中重力的平均功率为______.

题型:单项选择题

一般在较大型的综合布线中,将计算机主机、数字程控交换机、楼宇自动化控制设备分别设置于机房;把与综合布线密切相关的硬件或设备放在______。光纤电缆需要拐弯时,其曲率半径不能小于______。

A.30cm
B.40cm
C.50cm
D.60cm

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