《招标投标法》规定，投标文件应当对招标文件提出的( )作出响应。
A．实质性要求和条件
B．投标人须知
C．评标标准和方法
D．技术条款
参考答案：A
I coutdn't have got to the meeting on time____________ an earlier train.
A．if I had not caught
B．unless I had caught
C．if ! did not catch
D．unless I caught
正后壁心肌梗死出现特征性心电图改变的导联是（）。
A.V1～V3
B.Ⅱ、Ⅲ、aVF
C.V3～V5
D.V7～V9
E.Ⅰ、aVL
