题目

Hong Kong singer and actress Gigi Leung（梁咏琪）visited in mid-October some poor families in Inner Mongolia, ______ that her trip will ______ public awareness of problems faced by the children in poor areas. A.    hoped; raise    B.    hoping; rise    C.    in the hope; raise    D.    in hopes of; raise 答案：C关于四冲程柴油机的工作过程有以下几种说法：①压缩冲程中，机械能转化为内能；②做功冲程中，内能转化为机械能；③只有做功冲程是燃气对外做功；④柴油机吸气冲程吸入的是空气和柴油混合物．以上说法中正确的是（　　）A．只有①②B．只有③④C．只有①②③D．①②③④