题目

锂电池是新一代高能电池，目前已研究出多种锂电池｡ 某种锂电池的总反应 下列说法中正确的（） A . MnO2 在该反应中作为催化剂 B . 该反应属于分解反应 C . 使用电池时化学能转化为电能 D . 反应后 Li 的化合价为 + 2 价 答案：CFour girls were at the same school. They were good friends, so they often studied and played together. They went to school every day by taxi.One day one of the girls said, “There is a test this morning. Let’s go to school late. Then we won’t have to take the test.” “What can we tell the teacher?” One of the girls said. “He’ll be angry. We’ll need a good excuse.”The girls thought for several moments, then one of them said, “Let’s tell him that our taxi had a flat tire(爆胎).” “That’s a good idea,” the other girls said. “We’ll tell him that.”They arrived at school an hour later. The test was finished.“Why are you late?” the teacher asked. “You miss the test.” “Our taxi had a flat tire,” one of the girls said.The teacher thought for a moment, then he said, “Sit down, one of you in each corner of the room.” The four girls did this. Then the teacher said, “Write the answer to this question on a piece of paper: Which tire was flat?”【小题1】The four girls went to school every day by ________.A．busB．taxiC．subwayD．bike【小题2】One day the four girls got to school late because they ________.A．didn’t like their teacherB．got up late in the morning C．didn’t want to take the testD．had an accident on the road【小题3】What’s the meaning of the word “excuse” in Chinese?A．对不起B．请假C．借口D．请示【小题4】The teacher asked the four girls to sit down like Picture ________. A．B．C．D．【小题5】The passage implies(暗示) that ________.A．the teacher was always angry with his studentsB．the teacher would get the same answer to the question from the four girlsC．the four girls always have good ideasD．the teacher was strict with his students