软件危机出现于60年代末,为了解决软件危机,人们提出了【 】的原理来设计软件这就

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问题:

软件危机出现于60年代末,为了解决软件危机,人们提出了【 】的原理来设计软件这就是软件工程诞生的基础。

考点:计算机等级考试VISUALFOXPRO计算机二级(VF)21
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下列各项中,契税计税依据可由征收机关核定的是( )。

A.土地使用权交换

B.国有土地使用权出让

C.土地使用权赠与

D.以划拨方式取得土地使用权

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I can't stay up late. I have to go to bed__________11:00.[ ]

A. until  

B. on    

C. after  

D. by

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The flying fox is not a fox at all. It is an extra large bat that has got a fox’s head, and that feeds on fruit. Like all bats, flying foxes hang themselves by their toes (趾) when at rest, and travel in great crowds when out flying. A group will live in one place for years. Sometimes several hundreds of them occupy a single tree. As they return to the tree towards sunrise, they quarrel among themselves and fight for the best places until long after daylight.

Flying foxes have babies once a year, giving birth to only one at a time. At first the mother has to carry the baby on her chest wherever she goes. Later she leaves it hanging up, and brings back food for it to eat. Sometimes a baby bat falls to the ground. Then the older ones fly down and try to pick it up. If they fail to do so, it will die. Often hundreds of baby bats can be found lying on the ground at the foot of the tree.

小题1:The passage tells us that there is no difference between the flying fox and the ordinary bat in ______.

A.their size

B.their appearance

C.the kind of food they eat

D.the way they rest小题2:Flying foxes ______.

A.double their number every year

B.fight and kill a lot of themselves

C.move from place to place very often

D.lose a lot of their young小题3:At daybreak every day flying foxes begin to ______.

A.fly out toward the sun

B.look for a new resting place

C.come back to their home

D.go out and look for food小题4:Flying foxes have fights ______.

A.to occupy the best resting places

B.only when it is dark

C.to protect their homes from outsiders

D.when there is not enough food小题5:How do flying foxes care for their young?

A.They only care for their own babies.

B.They share the feeding of their young.

C.They help when a baby bat is in danger.

D.They often leave home and forget their young.

题型:填空题

在EXCEL中,产生图表的数据发生变化后,图表()。

A.会发生相应的变化

B.会发生变化,但与数据无关

C.不会发生变化

D.必须进行编辑后才会发生变化

题型:填空题

滑升模板正常滑升速度约为( )mm/h。

A.100~150

B.150~350

C.350~500

D.大于500

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