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【单选题】
当砌体结构作为一个刚体,需验算状态稳定性时,对结构构件承载力起有利作用的永久荷载分项系数应取 ( )。A.
1.2
B.
1.35
C.
1.5
D.
0.8
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举一反三
【简答题】高速铁路四跨绝缘锚段关节检修周期为____年。
【简答题】高速铁路四跨非绝缘锚段关节检修周期为____年。
【单选题】Certified Cargo Screening Facilities are charged with ___.
A.
randomly selecting about twenty percent of all air cargo, and inspect these shipments before they are loaded on any aircraft
B.
conducting background checks for all airlines and airport employees who are in contact with international cargo air shipments
C.
conducting one-hundred-percent inspections of all shipments that will eventually travel on passenger aircraft
D.
reporting on suspicious cargo shipments originating from abroad, through a program called “Automated Targeting System”
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