小亮早晨从家骑车到学校先上坡后下坡，行程情况如图所示，若返回时上坡，下坡的速度仍保持不变，那么小亮从学校骑车回家用时间是（）分钟

题干

A：30

B：37.2

C：60

D：45

上一题下一题 0.0难度选择题更新时间:2015-09-06 12:49:30

B

根据短文理解，选择正确答案。

Attention, Students! Beach Party Comes!

We will hold an outdoor party in Fulong on July 10.

Activities	1). Bike riding or hiking from the Student Centre to the beach 2). A cookout (野炊) on the beach 3). Swimming and sailing competitions
You should bring	sun cream, sunglasses, hats, swimsuits, hiking shoes, and personal items
Deadline (最后期限) for signing up	Friday, June 28
Fee	$300 per person(每人)
Meet at the Student Centre at 9:30 am, July 10.