_____ everybody knows about it, I don't_爱下问搜题

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问题选择题

_____ everybody knows about it, I don't want to talk any more. [ ]

A. For

B. Even

C. Since

D. However

答案

答案：C

单项选择题

当采用磁铁矿粉做加重质，其磁性物含量不应小于（）。

A、85％

B、95％

C、80％

D、90%

填空题

异步传输ATM技术是一种【12】和复用技术。