设备修理作业时,油盆着火,可以用()灭火。
A、水龙头
B、干粉灭火器
C、水盆泼水
D、蒸汽
参考答案:B
our textbook ,the English spoken in England in the past is very different from ____ spoken at present.
A.Based on; that
B.Bases on; that
C.Base on; one
D.Based on; it
要用量筒量取320g的食用油,应量多少立方厘米的这种食用油?已知(ρ油=0.8×103kg/m3)