锅炉进行水压试验时,当在5min内降压不超过()时为合格。
A、0.2MPa
B、0.5MPa
C、1.0MPa
D、1.2MPa
参考答案:B
Would you like _______ knife and fork,or would you rather use_______ chopsticks,sir?[ ]
A .the;the
B. a;/
C./;the
D./;/
初始添敷油泥时,为提高油泥的粘附性,首先要检查木材和泡沫聚苯乙烯的表面有无()。