The American college students like to _______ most of all.
A. discuss problems on philosophy
B. play balls
C. earn enough money
D. go to the cinemas or theatres
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A.neverB.everC.sometimesD.often
A. never
B. ever
C. sometimes
D. often
在氧化还原滴定中,选择指示剂的基本原则是______。
A.questionB.notionC.exceptionD.vocation
A. question
B. notion
C. exception
D. vocation
我国西北地区物资出口最为便捷的港口是()
A. 连云港
B. 青岛
C. 天津
D. 秦皇岛