下列关于淀粉与油脂的说法不正确的是 [ ]
A. 在人体中缓慢氧化后都能释放出能量
B. 都是由C、H、O三种元素组成的
C. 常温下都呈固态
D. 分子组成和结构都不相同
答案:C
-What was Susan doing at 8 last night?
-She __________ her homework at 8 last night.
A. is doing
B. was doing
C. did
D is did
矿山企业不得录用()从事矿山井下劳动。
A.未成年人
B.成年人
C.老年人
D.妇女