招标文件中未载明招标控制价的应在提交投标文件截止时间（）日前予以公示。
A、5
B、10
C、15
D、20
参考答案：B
—Are there any school things in the store?
—______. But there are some fruit and vegetables. [ ]
A. Yes, there are
B. No, there aren't
C. Yes, they are
D. No, they aren't
在连续式退火炉中无法进行强制冷却。（）
