仓库灭鼠，如贮藏食物水份低于15％，只要防鼠设施，做好断水工作，原来躲藏在内的鼠几天就会死亡。（）
A.5天
B.7天
C.10天
参考答案：B
My father and his teacher talked for about an hour of things and persons ______ they remembered at the school.
A．that
B．which
C．who
D．what
“烧流”的原因及产生的现象，操作当中如何调整？
