绞车下放车辆时应与（）配合好随推车随放绳，禁止留有余绳。
A.班组长
B.信号工
C.把钩工
D.打点
参考答案：C
24. It was at twelve o’clock___we finally arrived at the village____we spent our happy childhood.
A．that; that
B．when; that
C．when; what
D．that; where
计量法规定必须依法（）计量器具。
A.制造
B.运输
C.使用
D.报废
E.销售
