题目内容
（请给出正确答案）
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
抱歉！暂无答案，正在努力更新中……
更多“There is only one way to execute a program continuously using Keil C51 software.”相关的问题
To search for any information needed on tomorrow’s Web, one only has to _____.
［A］wade through screen after screen of extraneous data
［B］ask the Web to dispatch some messenger to his door
［C］use smart software programs called “agents”
［D］explore Web sites by the thousands and pick out what’s relevant
MB Sure. I'm free right now.
WA Well, we have six people who have volunteered to go, but we only need five. Ordinarily it's the other way round, but we're going to have to make a decision about whether Tracy or Dave should be the one who doesn't go.
MB Let me talk to each of them first. Perhaps one of them isn't interested in going. But if they're both interested, I'll have to think about it a bit before I decide.
What is learned about the Calgary trip？
A．It still has not been approved.
B．Several inexperienced people are going.
C．More people have asked to go than are needed.
D．There is not enough money in the budget for it.
It will only take me a minute to get your watch fixed, it will be ready______ .
A．by the way
B．right away
C．at last
D．in that case
Not only ______ polluted, but ______ crowded.
A．was the city, were the streets
B．the city was, the streets were
C．was the city, the streets were
D．the city was, the streets were
此题为判断题(对，错)。
Not only was she hard-working, ______.
A．how beautiful she was
B．was she helpful
C．but she was also polite
D．what a beautiful girl
Only when _____ in 1945 _____ to his hometown.
A．the war was over ; he returned
B．was the war over ; he returned
C．was the war over ; did he return
D．the war was over ; did he return
A．People learn language only by imitation and association.
B．Language is a wonderful way of communicating our ideas to other people.
C．Children learn words by themselves, but learn how to make requests, to agree or disagree, even to lie from others.
D．Children are natural born learners of languages.
听力原文： When Iraqi troops blew up hundreds of Kuwaiti oil wells at the end of the Gulf War, scientists feared environmental disasters. Would black soot in the smoke from the fires circle the globe and block out the sun？
Many said "no way"; rain would wash the black soot from the atmosphere. However in America, air-sampling balloons have detected high concentrations of particles similar to those collected in Kuwait.
Now that the fires are out, scientists are turning their attention to yet another threat: the oil that didn't catch fire. It has formed huge lakes in the Kuwaiti desert. They trap insects and birds, and poison a variety of other desert animals and plants.
The only good news is that the oil lakes have out affected the underground water resources. So far, the oil has not been absorbed because of the hard sand just below the surface.
Nothing, however, stops the oil from evaporating. The resulting poisonous gases are choking nearby residents.
Officials are trying to .organize a quick cleanup, but they're not sure how to do it. One possibility is to burn the oil. Get those black soot detectors ready.
(31)
A．The threat of poisonous desert animals and plants.
B．The exhaustion of energy resources.
C．The destruction of oil wells.
D．The spread of the black soot from the fires.
Why do policemen often use fingerprints in their investigation？
A．Because it is the only way to identify the suspect.
B．Because it is the easiest way to solve a criminal case.
C．Because they can be easily recorded with printer's ink.
D．Because they can help policemen to identify their owners.
Water
The second most important constituent(构成成份) of the biosphere(生物圈) is liquid water. This can only exist in a very narrow range of temperatures, since water freezes at 0℃ and boils at 100℃. Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form. of the salt water of the oceans—about 97 per cent. The rest is fresh, but three-quarters of this is in the form. of ice at the Poles and on mountains, and cannot be used by living systems until melted. Of the remaining fraction, which is somewhat less than one per cent of the whole, there is 10—20 times as much stored underground water as there is actually on the surface. There is also a tiny, but extremely important fractions of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation(循环) of the biosphere has to pass. Water evaporated(蒸发) from the surface of the oceans, from lakes and rivers and from moist(潮湿的) earth is added to it. From it the water comes out again as rain or snow, falling on either the sea or the land. There is, as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land, but there is more rainfall over the land than over the oceans, and the balance is restored by the runoff from the land in the form. of rivers.
Liquid water only exists______.
A．in the center of the earth.
B．on the surface of our planet.
C．in a very narrow range of temperatures.
D．in the costal areas of the earth.
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
