题干

It is necessary to explain your theory _____, otherwise the  audience won't make sense of what you are trying to get across.
A.on purposeB.at lengthC.at randomD. on average
上一题 下一题 0.64难度 单项选择 更新时间:2014-04-01 03:16:27

答案(点此获取答案解析)