题目

To those of you who received honors, awards, and ____, I say, well done. And to the average students, I say, you, too, can be President of the United States.A.distinctions B.contributions C.solutions D.attractions 答案：【答案】A【解析】考查名词词义辨析。句意：对于你们那些已经收到荣誉、奖励和勋章的人，我要说，做得好。对于一般的学生，我要对你们说，你也可以成为美国的总统。A. distinctions勋章；B. contributions贡献；C. solutions解决方案；D. attractions吸引。根据honors, awards可知此处用“勋章”符合语境，故选A项204g含有等体积的混合气体中，氢气的质量是　　　　　　[　　] A．1g　　　B．2g　　　C．3g　　　D．4g