题目

某种机器工作前先将空油箱加满，然后停止加油立即开始工作，当停止工作时，油箱中油量为．在整个过程中，油箱里的油量（单位：）与时间（单位：）之间的关系如图所示． （1）机器每分钟加油量为_____，机器工作的过程中每分钟耗油量为_____． （2）求机器工作时关于的函数解析式，并写出自变量的取值范围． （3）直接写出油箱中油量为油箱容积的一半时的值．    Are Canadians willing to help strangers? If you are in the 1.________ need of any help, such as asking the way, you can ask some 2.________ passer- by or policeman. They will be very happy to lend you hand. 3.________ Once I lose my way in Montreal and had to ask a passer- by 4.________ for direction. As you probably know, most the people in Montreal 5.________ speak French. The passer- by whom I turned for help seemed to 6.________ have some difficulty in understanding my English but perhaps 7.________ had more difficulty in expressing himself in English. So, he 8.________ managed to tell me how to get to my destination(目的地) by his 9.________ broken English. At that time, I was indeed very much moving by 10.________ his readiness to help a stranger.