因合同到期，单位不予续签导致失业。已经缴纳失业保险3年，不知道可以领取多久失业金？每

剖面图沿外墙也注3道尺寸，第一道注室外地坪到女儿墙的总高度，第二道注室外地坪，室内地坪，楼面的间距，第三道尺寸标注是（）和（）。

How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?

A．unless

B．when

C．until

D．before

按要求完成句子。

1. There was something important in today's newspaper. (改一般疑问句)  

    ________ ________ ________  important in today's newspaper?

2. I wrote a long letter last night. (改为否定句)  

    I ________  ________ a long letter last night.

3. I went to the zoo near my home. (对画线部分提问)  

    ________  ________  you go?

4. We had a lot of fun in the park. (改为同义句)  

    We ________  ________  ________ ________ in the park.

5. Mary did her homework yesterday evening. (改为一般疑问句)    

   ________ Mary ________ her homework yesterday evening?

6. We had a chorus competition last week. ( 对画线部分提问)  

   ________ ________ you have a chorus competition?

中药药理实验设计的三原则是什么?