大型储罐罐底焊缝的致密性,应采用()方法进行检查。
A.真空箱试验
B.氨气试验
C.充水试验
D.煤油渗漏试验
参考答案:A
The animals that are having winter sleep look___________ dead. You can't wake them
up by touching. [ ]
A. as well as
B. as good as
C. as far as
D. as soon as
使用全力矩法机械式力矩限制器,起重量特性曲线要遵循在任何幅区处,臂架上所有载荷对臂根()的力矩为()。