沥青的燃烧属于()。
(A)蒸发燃烧
(B)分解燃烧
(C)表面燃烧
(D)阴燃
参考答案:A
Here is a photo of ____________ family.
May I have one of ____________?[ ]
A. yours, mine
B. your, your
C. my, yours
D. your, mine
某KOH样品中含水7.62%,含K2CO3 2.38%,含KOH 90%。将1.00 g样品加入含HCl 3.65 g的盐酸中,过量的酸用适量的KOH中和,蒸发后可得到固体[ ]
A.7.45 g
B.4.00 g
C.4.50 g
D.无法计算