问题
多项选择题
对混凝土用水的质量要求有（）等。
A、不影响混凝土的凝结硬化
B、不影响混凝土的强度
C、不影响混凝土的耐久性
D、不影响混凝土的经济性
E、不影响混凝土的和易性
答案
参考答案：A, B, C
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对混凝土用水的质量要求有（）等。
A、不影响混凝土的凝结硬化
B、不影响混凝土的强度
C、不影响混凝土的耐久性
D、不影响混凝土的经济性
E、不影响混凝土的和易性
参考答案：A, B, C
| 用方框中所给单词的适当形式填空，使短文正确、通顺。每词限用一次。 | |
1______ One of these problems is that it is difficult for these children to get education in cities. Luckily, there are some free schools for them, but they are not 2______. Ten-year-old Li Xin is one of the lucky girls who get a chance to study in one of these schools. Although she has to spend about two hours and change 3______ twice, she is very happy. For children like Li Xin who don't have enough money for school, these free schools are their 4______ choice, because they can have free classes, textbooks, uniforms and meals in the school for two years. But there is a long way to 5______. The free schools for children from migrant workers' (务工人员) families are not enough, because running a school is not easy and 6______ lots of money. A school officer said they needed at least one million yuan to run the school. "Luckily, some 7______ and companies donate (捐赠) money, used books and a lot more other things to help us. Also some people 8______ as teachers for free." he added. In one word, both the government and the people keep 9______ the whole country's education either in countries or in cities. Don't you think the children nowadays are 10______ than their parents were? Anyhow, we must try to give them an equal chance to get better education so that we can make our society harmonious (和谐) one. |