SS8型电力机车电制动高压试验：1.启动牵引风机与制动风机；2.换向手柄置于制动位调速手轮置（）；3.励磁电流徐徐上升至最大值
参考答案：9级
We shouldn't complain about being poor, because many families are much ____ after the big
earthquake. [ ]
A. better off
B. badly off
C. well off
D. worse
根据《劳动法》的规定，每月延长工作时间累计不超过( )h。
A．45
B．36
C．35
D．30
