( )适用于土建工程、货物和材料的招标。
A．一阶段单信封招标程序
B．一阶段双信封招标程序
C．二阶段招标程序
D．二阶段双信封招标程序
参考答案：A
鉴别多形渗出性红斑与药物过敏性口炎最重要的是两者（）
A.病史及发病急缓不同
B.治疗方法不同
C.预后不同
D.致病诱因不同
E.组织病理表现不同
A．The speaker’s friend entered his house from back door.
B．The speaker’s friend entered his neighbor’s house by mistake.
C．A thief entered the speaker’s house by mistake.
D．The speaker’s friend entered the room by climbing the apple tree.
