GBl7859借鉴了TCSEC标准，这个TCSEC是____国家标准。
C
暂无解析
CanIhave_____water?
()______ismyumbrella?It'soverthere.
DaMingcomesfromChina，heis_____(China).
—Where_____you_____?
—I'mfromBeijing
()Look____thenicecar.
