下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
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】限位绳与防坠绳的区别是什么（）
A.
限位绳没有缓冲包，防坠绳有缓冲包
B.
限位绳使用时必须时刻绷紧，防坠绳使用时不需要时刻绷紧
C.
挂限位绳的锚点只需能够承受使用者的静态重力，挂防坠绳的锚点必须能够承受使用者的冲击力
D.
限位绳有效段长短可调节，防坠绳有效段长短不可调节
E.
限位绳的大钩子不可以横向受力，防坠绳的大钩子可以横向受力