题目内容

将软件从一种计算机环境转换到另一种环境运行的难易程度是指软件的(52)。在规定的条件下和规定的时间间隔内,按设计要求,软件成功运行的特性称为(53)。

A. 可靠性
B. 可移植性
C. 可使用性
D. 灵活性

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“让学校的每一面墙壁都开口说话”,“让学校的一草一木、一砖一石都发挥教育影响.”这体现了下列哪一种德育方法? ()

A. 榜样示范
B. 说服教育
C. 陶冶教育
D. 品德评价

在我国当前基础教育课程改革中,初中阶段课程设置的特点是 ()

A. 以综合课程为主
B. 以分科课程为主
C. 分科课程与综合课程相结合
D. 分科、综合与活动课程相结合

Because of this interaction, the person who both smokes and drinks heavily may be at a greater risk of becoming ill than one who drinks like a fish, but never smokes or who smokes like a chimney, but never drinks. To get an idea of how this synergism may work, consider what happens when a smoker lights up a cigarette. With each puff he inhales at least 4,000 different chemicals. These include toxic hydrogen-cyanide, carbon monoxide and nitrogen-dioxide gases, and four dozen compounds such as benzo pyrene and radioactive polonium 210 . All are known as carcinogens. Most chemical vapors in tobacco smoke get deposited in the mouth, nose, throat and lungs in a coating called tar. It is in this tar that most of the cancer--inducing potential of tobacco smoke lies. Then in a scenario typical of chronic heavy drinkers--most of whom also smoke--our smoker feels thirsty and washes down that smoke coating in his mouth and throat with whisky. The alcohol in his drink is not in itself a carcinogen, but it may act as a solvent, dissolving the tar-taped tobacco poisons, and easing the transport of carcinogens across membranes.
Our smoker continues to drink. Soon he lights another cigarette and inhales deeply. Behind his embattled lungs, meanwhile, his liver has gone on full alert to save his life. The three-pound chemical factory, which cleans most toxins from the bloodstream, reacts to alcohol as a foreign substance and metabolizes 95 percent of it into other chemicals. But in turning its energy to clearing just one-half ounce of pure alcohol--the amount in a standard drink--per hour from our drinking smoker's blood, the liver's other metabolic functions suffer a sharp decrease. Poisons from tobacco smoke that otherwise would be removed from his blood within minutes are now allowed to flood his body for hours or days, depending on how much alcohol the liver must dispose of.
The person who smokes one or two packs of cigarettes a day loses on average six to eight percent of his blood's oxygen carrying capacity. If our heavy smoker's use of alcohol has led to alcoholism, he is probably malnourished. This malnourishment compounds problems he is having with insufficient oxygen. His brain cells are dying from it.
The synergistic effect of alcohol and tobacco may deliver a powerful blow to the cardiovascular system as well as the upper respiratory tract. For those prone to hypertension who drink more than two ounces of alcohol a day, high blood pressure is common and with it the increased risk of stroke and heart attack. For hypertensives who combine smoking and drinking, the risks are even greater.
Which of the following can be the best title of this passage?

A. Dead Mixer=Alcohol+ Tobacco.
B. Alcohol and Tobacco Are Dangerous to Health.
C. Tobacco Contains a Lot of Toxic Compounds.
D. Interaction of the Alcohol and Tobacco.

有以下程序: #include <iostream> using namespace std; int main() { int x=15; while(x>10&&x<50) { x++; if(x/3) { x++; break; } } cout<<x<<end1; return 0; }

A. 15
B. 16
C. 17
D. 18

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