起重机械的起升机构和变幅机构必须采用()制动器。P24
A.常开式
B.常闭式
C.综合式
D.形式不限
参考答案:B
补全对话
A: Excuse me. 1 ?
B: Bank? Go down this road and turn right at the third crossing, then turn left at the second crossing.
You can find a Bank.
A: How far is it ?
B: About ten minutes' walk. 2
A: Take the bus ? 3
B: The No.10 Bus. Is there a bus stop near here?
A: 4 . I'm a new policeman, you can ask him.
B: Thank you all the same.
A: 5 .
日本和英国相比,正确的是[ ]
A、海陆位置相同
B、人种类型相同
C、气候类型相同
D、社会性质和经济发展水平相同