联合国提出,将()作为全球解决老龄问题的奋斗目标
A.经济发展
B.社会福利
C.小康社会
D.健康老龄化
E.扶助老人
参考答案:D
In the old days, they_______ in the factory from morning to evening. [ ]
A. were made to work
B. asked to work
C. made to work
D. were asked for work
毒品严重危害人类社会,冰毒的化学式为C10H15N,有关冰毒的叙述正确的是( )
A.相对分子质量为135
B.完全燃烧时的生成物只有两种
C.不完全燃烧时会生成CO
D.H、N元素的质量比为10:15:1