容器阀按()可分为:膜片式、自封式、压臂式。
A. 用途
B. 密封形式
C. 结构形式
D. 启动方式
当某制冷系统中压缩机启动后,热力膨胀阀“咝咝”作响的原因可能是:()。
在朗读“不论发生什么,我总会跟你在一起。”这句话时的声调和语气是()
A. 轻缓、坚定
B. 急促、兴奋
C. 急促、坚定
D. 轻缓、兴奋
According to the Sale Contract,it’s of FOB plus S.T.term.It’s quite obvious that().
A. our ship is not responsible for trimming and stowing
B. our ship is responsible for trimming and stowing
C. our ship is responsible for expenses
D. our ship is not responsible for expense