一般通过高压灭菌,pH值会向碱性一则偏移0.1~0.3。
参考答案:错
—Is this his pencil?
—______. [ ]
A. Yes, I am
B. No, it isn't
C. Yes, it's my pencil
目前应用最广泛的滤料是()
A.无烟煤
B.矿石粒
C.聚苯乙烯珠
D.石英砂