目前,采用()技术生产的锚链质量超过其他种类的锚链。
A.气焊
B.CO2保护焊
C.碳弧焊
D.塞焊
参考答案:C
肝硬化合并上消化道大出血后常可并发
A.血红蛋白下降B.头痛C.肝性脑病D.黄疸E.感染
If the cause of severe list or trim is off-center ballast,counterflooding into empty tanks will().
A.increase the righting moment
B.increase the righting arm
C.increase list or trim
D.decrease list or trim