【多选题】下列有关管道管材中钢管的说法正确的包括( )
D.
钢管按照制造方法包括有缝钢管、卷焊钢管和水煤气输送钢管
E.
焊接钢管的连接方法有螺纹连接、焊接;无缝钢管、不锈钢管的连接方式主要有焊接、法兰连接
【简答题】A.Every room is empty. B.Every room is superbly appointed. C.Every room has a public bathroom. D.Every room is the same.
【简答题】Every room was lavishly decorated.
【简答题】A.Ho dines out with his wife every weekend. B.He is excellent but looks bad-tempered. C.He does not care about his appearance. D.He is not quite popular with his patients.
【简答题】某宜昌航运公司从外地买入一艘2000吨级散货船,持有三峡库区适航证书。作为船舶电气验船师登船实地检验发现该船配备一套由主机驱动的40KNm的液压舵机,假如舵机油泵驱动整改为电力驱动,请分析舵机电力系统的电机配备、应急能源、供电、电机控制、保护、电磁换向、系统报警、舵角指示等方面的规范规则要求。
【多选题】对于半自动或全自动控制系统的木材干燥室,主要检查控制系统能,否按干燥基准中规定的温、湿度,来控制干燥室的( )以及电机的换向等执行机构的正常工作。
【单选题】We'll give every teacher room for development.
【单选题】To make room for teachers’ correction, the students had better write their composition _____.