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举一反三
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...
A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.
【多选题】挂挡时不能顺利挂入档位，发出齿轮撞击声，可能的故障原因有（）
A.
拨叉轴弯曲变形
B.
自锁或互锁钢球破裂、卡滞
C.
变速连接杆调整不当或损坏
D.
同步器耗损或有缺陷
【单选题】活塞压缩机有异常的响声和撞击声，但出口温度不高压力不低，则( )因素可以排出。
A.
润滑不恰当
B.
气阀安装不正确
C.
气缸余隙太小
D.
主轴颈、连杆、十字头销磨损，椭圆度大