B contributed to 25 percent of observed global warming
C Can produce greenhouse gases
D absorb more of sun’s energy and warmth than white background
E still surpass soot in warming the world’S climate during the last century
F Can be seen mostly in the Northern Hemisphere
第四部分:阅读理解(每题3分,共45分)
下面有3篇短文,每篇短文后有5道题,每道题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题,从4个选项中选择1个最佳答案涂在答题卡相应的位置上。
难度B/C级
Inspecting a Used Car
The scariest part of buying a used car is not being completely sure of what condition it’s in.A car that’s been in a major accident is always a bigger risk,but sellers often try to hide this information.Andrew Bleakley, evaluator-inspector,runs a mobile vehicle inspection service in Montreal.For about$80 he will perform a full,unbiased inspection on a used vehicle.In his 10 years as a professional inspector, Bleakley has seen a lot.He warns.“Watch out for dealer demonstration vehicles which are used.not new.They may have been in a collision.”He adds that it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it.Bleakiey has special tools to check for this.
Bleakley always recommends hiring all independent technician to inspect the condition of a used car before you buy it.The problem is finding someone qualified to do the inspection.Which he says generally doesn’t mean just any mechanic.A thorough mechanical inspection includes checking the compression,all major systems,including the engine,electrical and charging systems,transmission and drive line,fluids,brakes,suspension,and steering.Essential,too, is all inspection of the car’s body and finally a road test.There are,however, a few things everyone can do before buying a used Car:
Do a visual check of the car.Look at the right rear door hinges.If they are very worn, or the door doesn’t close well,the car may have been used as a taxi.Holes in the roof could mean the car was used for deliveries.