瓶组站管道的强度压力试验介质为()。
A、清水
B、氮气
C、氧气
D、压缩空气
参考答案:A
下图是一幅漫画作品《如此“修墙”》:一位清朝官员用一张纸条(上面写着“西方先进技术”)粘在墙上,下列表述内容与该漫画的讽喻意义一致的是( )
A.“外需和戎”
B.“遗其体而求其用”
C.“天不变,道亦不变”
D.“变者天下之公理”
There shall be()into sleeping rooms from cargo and machinery spaces or from galleys,storerooms,drying rooms or communal sanitary areas.
A.no direct openings
B.direct openings
C.no more than one direct opening
D.up to one direct opening