若有： int x=25，y=14，z=19； 则在计算表达式x++＜=25&&

在APU系统页上出现“FLAPOPEN”，表示（）

A.APU进气门打开

B.襟翼放出

C.襟翼断开

D.进气门打不开

2004年1月，某村民委员会进行换届选举。投票结束后，39名村民以有候选人在选举前给他们发钱为由，向县政府反映此次选举涉嫌贿选，要求调查。县政府据此派出联合调查组，经调查后出具书面答复，认为该村换届选举不存在贿选，确认选举结果合法有效。　　请结合宪法学的知识和原理，以及我国现行宪法和法律的规定分析材料并回答问题：　　(1)县政府关于选举结果的确认行为是否合法为什么　　(2)村民如果认为村民委员会选举有问题，应如何维护自己的权利

转化反应中为什么要控制适宜的水碳比？

除非一种行为满足下列条件，否则理性人就不会行事（）

A.可以为某人赚钱。

B.符合伦理道德。

C.产生了大于边际利益的边际成本。

D.产生了大于边际成本的边际利益。

E.以上每一种情况都不是。

On cold days in Delhi, the poor light bonfires (篝火) of tyres, trees and rags whose fumes mix with the exhaust from the city’s 2 million vehicles to form a thick smog. On most days in Mexico City, a blanket of pollution cuts off views of the surrounding mountains. On one famous occasion it got so bad that birds fell dead out of the sky on to the Zocalo, the city’s main square. Throughout the developing world, smogs in many big cities are getting worse as more people use cars and more manufacturing firms are belching out (喷出) pollution. Congestion is on the rise. too: according to one estimate, a car in Bangkok now spends the equivalent of 40 days a year stuck in traffic. The air in Asia’s cities, like the water in its rivers, is particularly unhealthy, containing levels of dust and smoke several times higher than in the rich countries’ cities.

Environmentalists in the developed world also worry about air pollution in poorer countries. not just out of the goodness of their hearts but because they fear it may affect their own backyard. Carbon-dioxide emissions, thought to be the cause of global warming, are growing particularly fast in developing countries. So are emissions of sulphur dioxide, blamed for acid rain. which sometimes falls hundreds of miles from the source of the pollution.

But the harm that air pollution causes in the developing countries themselves is much more serious and immediate. The biggest concern are indoor air pollution, lead emissions and small particles. Indoor pollution in poor countries is not much talked about, but it is often as damaging to health as smoking cigarettes. Around a third of all energy consumed in developing countries comes from wood, crop residues and dung, which are often burnt in poorly designed stoves within ill-ventilated (通风很差的) huts. Studies of women in India and Nepal exposed to smoke from such fuels show that their death rates from chronic respiratory disease are similar to those of heavy smokers.

Lead has long been known to be dangerous in large doses. But only since the 1970s have scientists been aware that relatively small quantities of lead in the bloodstream can be harmful to humans. In particular, many studies show a correlation between levels of lead in children’s blood and lower IQ scores, hearing loss and hyperactivity (活动过度).

But the kind of air pollution thought to cause the most damage to human health in developing countries is that from small particles. Caused by vehicle exhausts, coal-burning smoke from factories and dust stirred up by vehicles, these particles easily find their way into people’s lungs. Studies the world over have shown a p positive correlation between small particles in the air and death rates.

Which of the following statements about indoor pollution in developing countries is NOT true().

A. It is as damaging as smoking cigarettes.

B. It is often caused by burning fuels in poorly designed stoves.

C. It is mainly caused by smoking inside the ill-ventilated huts.

D. It is able to lead to chronic respiratory diseases.