G．开标时间、评标、定标的原则
A．条件 B．
B．中的时间
C．规范 D．投标
参考答案：B,D,E,F,G
644÷81，估算的商约是______．810÷39，估算的商约是______．
Tomorrow I have a day off, so I want to ______. [ ]
A. take a class
B. hang out with my friends
C. takes a class
D. hangs out with my friends
