问题
填空题
汽车开始行驶时,油箱中有油40升,如果每小时耗油5升,则油箱内余油量y(升)与行驶时间x(小时)的关系式为( ),该汽车最多可行驶( )小时。
答案
;8
汽车开始行驶时,油箱中有油40升,如果每小时耗油5升,则油箱内余油量y(升)与行驶时间x(小时)的关系式为( ),该汽车最多可行驶( )小时。
;8
Passage Two
The Prudhoe Bay oilfield has been shut down because ______.
A.there was a serious leakage problem with the pipeline
B.the pipeline suffered a small leak and severe corrosion
C.better pipeline was needed to meet the increasing production
D.the newly-replaced pipeline didn’t work properly