题目

We may find that learning a foreign language does not have to be______learning our mother tongue, but can in fact be twice_______． A . twice as hard as; as easy as B . as twice hard as; as easy C . twice as hard as; as easy D . as twice hard; as easy as 答案：C小明骑车上学，开始时匀速行驶，途中因交通堵塞停留了一段时间，后为了赶时间加快速度行驶．与以上事件吻合得最好的图象是A.B.C.D.