询价对象应当遵循独立、客观、诚信的原则合理报价,是绝对不得协商报价并且故意压低或抬高价格。()
参考答案:对
下列气体中哪种更易引起化学性肺水肿
A.一氧化碳
B.二氧化氮
C.光气
D.氮气
E.硫化氢
—_____ you go to the movies last Sunday?
—No, I _____.[ ]
A. Did; did
B. Did; didn't
C. Were; was
D. Were; wasn't