以下哪个文件属于产品采购文件的范畴？（） A.产品订货合同 B.设备金额表 C.工程

阅读理解。

     A young man once went to buy a pair of pants. When he got home, he went upstairs (上楼) to his

 bedroom and put them on. He found that they were two inches (英寸) long.

     Then he came out of his room to see his mother and his two sisters. They were washing something in

 the kitchen. "These new pants are too long, they need to be shortened (缩短) about two inches. Would

 one of you like to do this for me, please?" His mother and sisters were busy and none of them said

 anything. The mother went upstairs after she had finished washing and shortened the pants two inches. But

  she didn't tell her daughters about it.

     Later on, after supper, the elder sister remembered her brother's pants. So she went upstairs without

  saying to anyone, and shortened the pants two inches.

     The younger sister went to the cinema, but when she came back, she also remembered what her

 brother had said. So she ran upstairs, and took two inches off the legs of the new pants.

1. The new pants were _____.

    A. too long for the young man      

    B. two inches long

    C. six inches long                

    D. too short for the young man      

2. The young man asked _____ to shorten his pants.

    A. his mother and his two sisters      

    B. his mother and one of his sister

    C. his mother                    

    D. his mother or one of his two sisters

3. _____.his elder sister shorten his pants.

    A. After supper                      

    B. After the mother finished washing

    C. After the young man went upstairs    

    D. After the younger sister went to the cinema

4. How many inches were the legs of the new pants shortened by at last?

    A. Two.            

    B. Four.        

    C. Six.          

    D. Eight.

5. When the young man put on the pants, he would _____.

    A. feel happy      

    B. be very sad    

    C. thank his family    

    D. be very excited

为住院患者开具的麻醉药品处方为几日常用量（）。
为门诊中度疼痛患者开具的麻醉药品处方，每张处方不得超过几日常用量（）。
第二类精神药品一般每张处方不得超过几日常用量（）。

A.1日

B.2日

C.3日

D.5日

E.7日

—个边长是6分米的正方形，它的周长是（    ），它的面积是（    ）。

（8分）某中学化学研究性学习小组利用以下装置制取并探究氨气的性质。A中发生反应的化学方程式：2NH₄Cl + Ca(OH)₂CaCl₂ + 2NH₃↑+ 2H₂O

（1）A中的反应         （填“是”或“不是”）氧化还原反应；

（2）A装置还可用于制取气体         （只填一种）；

（3）实验室收集氨气的方法是         ；

（4）C、D装置中颜色会发生变化的是         （填“C”或“D”）；

（5）为防止过量氨气造成空气污染，需要在上述装置的末端增加一个尾气处理装置，合适的装置是         （填“F”或“G”）；

（6）当实验进行一段时间后，挤压E装置中的胶头滴管，滴人1-2滴浓盐酸，可观察到的现象是                         ；

（7）2010 年 11月9日晚，我省一冷冻厂发生氨气泄漏事件，500 多居民深夜大转移。假如你在现场，你会采用什么自救为法？                              。