相同质量的下列物质在氧气中完全燃烧消耗氧气最多的是[ ]
A、P
B、H2
C、S
D、C
B
I'll finish the job, _______ long it takes. [ ]
A. I don't matter when
B. not matter how
C. it doesn't matter if
D. no matter how
在一条Φ108×4mm的管路中,输送相对密度为1.2的某溶液,设要求输送的液体质量为67.82t/h,求A.体积流量?B.线速度?