共轭效应
A.295~300nmB.217~220nmC.1700~1800cmˉ1D.420nmE.低40cmˉ1
参考答案:D
Jack Chan _____ to Hollywood a few years ago. Now he ______ a famous
movie star.[ ]
A. went; is
B. has been; is
C. is; is
D. was; was
“一带一路”贯穿(),一头是活跃的东亚经济圈,一头是发达的欧洲经济圈,中间广大腹地国家经济发展潜力巨大。
A、亚欧非
B、亚非拉
C、亚欧非大陆
D、亚欧