II型集中器1min平均电压值存储:从整点起每隔()min存储一次,存储不小于31天的数据,存储原则按照“先入先出”顺序进行。
A.10
B.15
C.30
D.60
参考答案:B
His weekend was ______. He liked it very much. [ ]
A. great
B. bad
C. boring
D. terrible
物理消毒灭菌法是利用_____________或_____________等物理作用,使微生物的蛋白质及酶变性凝固。