较低的恢复时间目标(恢复时间目标)的会有如下结果:()
A.更高的容灾
B.成本较高
C.更长的中断时间
D.更多许可的数据丢失
参考答案:B
It has been estimated that the earth's surface temperature has increased one quarter to three quarters of a degree since 1805.
A.to
B.by
C.at
D.with
石灰石-石膏法中,通常要求吸收剂有纯度应在()以上。
A、70%
B、80%
C、90%
D、95%