题型:判断题 下图是某化学反应的微观模拟示意图,根据该图判断下列说法中正确的是A.该反应前后碳元素化合价没有改变B.该反应的生成物均是氧化物C.该反应前后各元素的原子总数不变 D.该反应属于复分解反应 查看答案
题型:判断题 He _____ at the last party. He felt sorry for it.[ ]A. makes some mistakes B. make a mistake C. made few mistakes D. made many mistakes 查看答案