当向盛有氯化铁溶液的烧杯中同时加入铁粉和铜粉,反应结束后,烧杯底部不可能出现的情况是( )
A.有铜无铁
B.有铁无铜
C.有铁有铜
D.无铁无铜
答案:B
---How ____ is it from here Ningbo to Xi'an?
---It's about two ____ flight.
A.long, hour's
B.far, hour's
C.long, hours'
D.far, hours'
既含菊糖又含淀粉粒的是()
A.人参
B.党参
C.桔梗
D.黄芩
E.贝母