题目

下列有关水的说法中正确的是（ ） A．水与冰块混合得到混合物 B．水的蒸发和水通电分解都属于物理变化 C．硬水是指含有较多可溶性钙、镁化合物的水 D．水沸腾时可冲起壶盖，说明温度升高分子会变大 答案：【考点】硬水与软水；纯净物和混合物的判别；分子的定义与分子的特性；化学变化和物理变化的判别． 【专题】空气与水． 【分析】A、根据混合物是指有两种或两种以上物质组成的物质进行分析； B、根据物理变化和化学变化的本质区别进行分析； C、硬水是指含有较多钙镁离子的水进行分析； D、阅读理解。     Failure is what often happens. It is everywhere in our life. Students may fail in exams, scientists may fail in their research work, and players may fail in competitions. (A) Although failure happens to everyone, but different people's attitudes (态度) towards failure are different.      Some people don't think that their failure is an important thing at all. So they pay no attention to it. As a result, they will have the (B)______ failure later. Some people think they themselves are fools and lose their hearts in everything after they get a failure. Then they (C)______ their time and energy on useless things. At last, they may really be fools as they have thought. (D)Other people are quite different from these two kinds of people mentioned above. Instead of being hopeless and lost, they draw a lesson from every failure and become more experienced. (E) they, after, will,hard, in, work, be, the, successful, end. So we should draw a lesson from every failure and become more experienced. 1. (A)处句中有一处错误，请找出并改正。（可用文字叙述）    _________________________________________________ 2. 在（B ）、（C ）处的横线上分别填上一个单词（B）_______ （C） _______3. 将(D)处句子译成汉语： __________4. 将(E)处的单词连成句子：    _________________________________________________ 5. 请从下面的选项中给短文选个标题，将答案标号填在此横线上：_______ ?A. Draw a lesson from every failure B. The attitudes towards failure C. Failure is everywhere in our life D. Failure is very important