GWD

仙蒂瑞拉

1．Large trucks account for 6%of miles but involved in 12%fatalities.the large truck with 3trailers had less than a third of accident rate of single or double trailer truck. So ,one way to reduce deaths is to increase use of 3trailer truck.

削弱。

Truck company have used 3trailer truck on lightly traveled section of major highway only.(答案怎么解释啊？)

doubleyou

conclusion：increase use of triple-trailer trucks to reduce death

evidence:triple-trailer trucks had less than a third of the accident rate of single- and double-trailer trucks

Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only

他因削弱，不是因为triple-trailer truck本身安全，而是因为它主要行驶在traffic少的路段