锅炉升压过程中,当汽压升至()时应通知热工冲洗仪表导管。
A.0.1~0.2MPa
B.0.2~0.3MPa
C.0.3~0.4MPa
D.0.4~0.5MPa
参考答案:C
旋转密封阀两侧充氮的目的是起()作用。
A.降低可燃成分
B.增加N2含量
C.密封
—Is it the _____ fashion to wear short skirts?
—Yes, short skirts are _____ [ ]
A. latest; on fashion
B. later; with fashion
C. later; at fashion
D. latest; in fashion