题目

51. Oil prices have __________（接近）their highest level for almost ten years. 52. Many workers were __________（失业的）because of the economic problem. 53. The way my brother talked to my mother __________（烦扰）me. 54. The n__________ temperature of a human being is about 37℃. 55. We are so poor that we __________（极少地）eat in the restaurant. 56. We must take __________（辛苦）to face the difficulties in our life. 57. The man felt __________（尴尬的）because he met his ex-wife in the supermarket. 58. The i__________ of the medicine are written in En为营造书香家庭，周末小亮和姐姐一起从家出发去图书馆借书，走了6min发现忘带借书证，小亮立即骑路边共享单车返回家中取借书证，姐姐以原来的速度继续向前走，小亮取回借书证后骑单车原路原速前往图书馆，小亮追上姐姐后用单车带着姐姐一起前往图书馆。已知骑车的速度是步行速度的2倍，如图是小亮和姐姐距离家的路程y(m)与出发的时间x(min)的函数图象，根据图象解答下列问题：（1）小亮在家停留了多长时间？（2）求小亮骑车从家出发去图书馆时距家的路程 y(m)与出发时间 x(min)之间的函数解析式.