液压支架立柱零件电镀层的技术要求对活塞杆行程表面落砂痕迹的规定有哪些?
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根据《建筑基坑支护技术规程》7.3.21要求,管井的成孔施工工艺,钻孔深度宜大于降水井设计深度()m。
A. 0.2~0.4
B. 0.2~0.5
C. 0.3~0.4
D. 0.3~0.5
Language reflects sexism in society. Language itself is not sexist, just as it is not obscene; but it can connote sexist attitudes as well as attitudes about social taboos or racism.
A. 正确
B. 错误
减价票包括()
A. 儿童减价票
B. 伤残军人减价票
C. 铁路员工减价票
D. 学生减价票