Maybe there are some things among the girl’s papers, like her school reports, old photos and so on. Can you _________ them and give me whatever you find?

A．go across

B．go over

C．go through

D．go with

随着人们生活水平的提高。轿车已逐步进入我国普通百姓家中.已知某国产骄车每行驶100km消耗8L汽油(1L＝10^-3m³)，汽油的密度为0.71×10³kg/m³、热值为4.6×l0⁷J／kg．则

⑴10kg汽油完全燃烧时所产生的热量是         J。

⑵当该汽车以50kW的功率在平直公路上以72km／h的速度匀速行驶时，它所受到的阻力等于        N。