某二级收尘系统,一级收尘效率为80%,二级收尘率为99%,则收尘系统总效率为()
A、99%
B、98.2%
C、99.8%
参考答案:C
_____these interruptions, the meeting would have finished earlier.[ ]
A. Except for
B. But for
C. In addition
D. Other than
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