开标应当在招标文件确定的提交投标文件截止时间的（）进行。
A.同一时间公开
B.单独确定时间公开
C.同一时间秘密
D.一定时间内公开
参考答案：A
—Learning a language isn't easy. It takes time. —I agree.（）. There's no shortcut.
A. All roads lead to Rome
B. Rome wasn't built in a day
C. Practice makes perfect
D. Slow but sure wins the race
监理及相关服务合同中关于规划设计和运行维护部分正确的说法是（）
A.应单独签订，服务范围及取费要在合同中明确
B.应合并签订，服务范围及取费无需在合同中明确
C.应单独或合并签订，服务范围及取费要在合同中明确
D.应单独签订，服务范围及取费无需在合同中明确
