I called you, but nobody answered. Where ________ you? [ ]
A. is
B. are
C. was
D. were
答案:D
糊精是()
A.崩解剂
B.黏合剂
C.填充剂
D.润滑剂
E.填充剂兼崩解剂
针对某一时期的煤矿安全工作重点,组织( )。
A.日常监察
B.重点监察
C.定期监察
D.专项监察