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问题 多项选择题

在项目招标的中标通知书发出后，招标人和中标人应按照( )订立书面合同。

A．招标公告

B．招标文件

C．投标文件

D．评标价格

E．最后谈判达成的降价协议

答案

参考答案：B,C

问答题

阅读下列文字，回答问题：

实验室制取氨气，常采用加热氯化铵和熟石灰混合物的方法．氨气是一种有刺激性气味、极易溶于水的气体，它的密度比空气小，是制取氮肥的一种基本原料．

（1）实验室制氨气可用到的仪器有：①大试管；②酒精灯；③量筒；④集气瓶；⑤水槽；⑥导气管；⑦漏斗；⑧天平；⑨药匙．下列选择正确的一组是______．

A．②③④⑥⑨

B．②④⑤⑥⑨

C．①②④⑥⑨

D．①②④⑤⑥⑨

（2）收集氨气的方法是______，原因是______．
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改错题

短文改错

Attention please, everyone.We have accepted the weather forecast on the radio this morning

that there will have a heavy rain tonight.Be sure shut the windows and doors until you leave your

classrooms.The sports meet that we planned to hold on tomorrow will be put off.After it becomes

fine, we'll make other announcement.We will have classes on Wednesday as usually.Since it is

colder tomorrow, please dress on more clothes in time.Those who comes to school by bike, don't

keep your umbrella open while riding.

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