题目

There's no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails. A . since B . if C . as D . while 答案：D四（2）班第一小组在跳绳比赛中，3名男生共跳了360个，4名女生共跳了326个。这个小组的7名同学平均每人跳（______）个。