题目

下列涉及学科观点的有关说法正确的是A. 微粒观：水是由氢原子和氧原子构成的B. 转化观：升高温度可以将不饱和硝酸钾溶液转变为饱和C. 守恒观：10mL质量分数40%的硫酸，加10mL水后质量分数变为20%D. 结构观：一氧化碳和二氧化碳分子不同，其化学性质不同 答案：【答案】D【解析】试题A、微粒观：水是由水分子构成，水分子是由氢原子和氧原子构成的，错误，B、转化观：由于硝酸钾的溶解度随温度的升高而增大，故升高温度可以将饱和硝酸钾溶液转变为不饱和，错误，C、守恒观：10mL质量分数40%的硫酸，加10mL水后质量分数要大于20%，因为10mL质量分数40%的硫酸阅读下面一篇短文，判断下列句子是否符合短文内容，符合的用“A”表示，不符合的用“B”表示。 Clean water is not only important for people to produce food, but necessary for our life. However, many people in Asia and Africa don't have enough clean water to use. The World Health Organization reports that almost 4,000 children die each day of dirty water or lack (缺乏) of water. Farmers use 70-85% of the world fresh water to produce food. People usually don't pay much attention to how much water industry(工业) uses, but you may be surprised to know that industry uses 59% of the water in developed countries. Home use takes up(占据) only 8% in the world. But as cities grow, more water will be used. The local government has to try to make people use less water. In 60% of European cities, people are saving water by using less. They even keep waste wafer for other use. In Australia, the government has encouraged people to collect rainwater and recycle water from showers for a second use. The US Environmental Protection Agency has made a water saving program to encourage families and businesses to check their water use and save more water. Scientists and the UN are looking for good water management as the key to solving the problem. We can all work together to protect our fresh water in our daily life. 1. In developed countries, most water is used by industry.   2.People in Asia have enough clean water to use.   3.To save water, Australians and Europeans both choose to recycle water for a second use. 4. According to the passage, scientists have found good ways to deal with water problems.   5.Home use of water will increase because of the growing of cities.