与招标文件确定的提交投标文件截止时间同时公开进行的是( )。
A．开标
B．评标
C．中标
D．签订合同
参考答案：A
It is no longer _________it was 20 years ago, ________it was so poorly equipped. [ ]
A. what; when
B. that; which
C. what; which
D. what; that
光纤连接器，FC/PC-SC/PC/MM/D3/L10以下说法正确的是（）
A.方头-园头/单模
B.园头-方头/单模
C.方头-园头/多模
D.园头-方头/多模
