下列现象中物体处于超重状态的是（ ） A．汽车过拱桥桥顶时 B．单摆摆球过最低点 发布时间：2017-07-18 20:35 │ 来源：www.tikuol.com 题型：多选题 问题： 下列现象中物体处于超重状态的是（ ）A．汽车过拱桥桥顶时B．单摆摆球过最低点时C．随电梯减速下降的物体D．绕椭圆轨道运动的卫星过近地点时
题型：多选题 完形填空。 What can people do when natural disasters (灾难) happen? Can we stop them? No, we can't. The onlything we can do is to 1 after the disasters. Last year I met Mr. Flood. It started raining and 2 raining almost a month: the water on the streets gothigher and higher every day. We used 3 instead of cars. We lost lots of things, including our businesses, our jobs and our homes. Schools 4 and farms were destroyed. We ran out of food and clean water. In some places the water was higher than the buildings. I felt like we lived in a(n) 5 world. Because of the flood, lots of 6 broke out. Because of the dead animals, some people 7 . The soil and other things made the water become very, very 8 . That was in summer time, so though it was raining, the 9 was still high. The hot weather and reallydirty water 10 the air very bad. Hospitals didn't have enough rooms for 11 . When the flood was over, I looked around my city. The word " 12 " can describe the situation. Everythingwas destroyed and lots of people were sick, but we were very 13 . I think. We had to 14 our city, take care of the sick people, and start our schools again. I just 15 that one day, people can stop the natural disasters whenever they happen. After all, people are very clever. ( )1. A. wake up ( )2. A. kept ( )3. A. bikes ( )4. A. started ( )5. A. water. ( )6. A. happiness ( )7. A. ran ( )8. A. dirty ( )9. A. temperature ( )10. A. had. ( )11. A. nurses ( )12. A. sad ( )13. A. weak ( )14. A. rebuild ( )15. A. want B. make up B. finished B. trains B. closed B. fire B. illnesses B. slept B. clean B. weather B. made B. doctors B. beautiful B. strong B. return B. hope C. clean upC. stopped C. boats C. opened C. ice C. hardnessC. died C. clear C. water C. changed C. patientsC. good C. happy C. remain C. see 查看答案
题型：多选题 医疗上颇为流行的“理疗特热法”就是利用铁粉缓慢氧化放出的热均匀稳定，使病员患处保持温热活血状态．则5.6g铁粉完全氧化成红色粉末（与铁锈颜色相似），消耗氧气的质量为（ ）A．2.4gB．3.2gC．2.13gD．1.6g 查看答案