問題詳情
【題組】44. It can be inferred that the "safety valve" in line 13 refers to
(A) a new kind of machinery
(B) an alternative for urban workers
(C) an area in a factory
(D) a procedure designed to protect workers
參考答案
答案：D
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)