微粒皮移植最佳覆盖物是（）。 A.猪皮 B.羊膜 C.同种异体皮 D.表皮细胞膜片

在戒毒所里，一名吸毒的学生后悔莫及，他痛苦地说：“我原先只吸香烟。有一天，一个朋友给了我一支烟，并诡秘地告诉我，这比我原来吸的烟要神奇得多。我当时想，这种烟我没吸过，何不试一试？谁知，这烟里面有海洛因，没吸几支，就再也戒不掉了，为此，我被迫多次拦路抢劫，自己也变成病鬼一个。”  

(1)联系这个学生的吸毒经历，说说他是怎样成为一个吸毒者的？

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(2)结合上述材料，说说吸毒有哪些严重危害？

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(3)每年的6月26日为”，2010年，构建和谐社会”。我们青少年应该怎样抵制毒品？

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根据短文内容完成表格。

Li Keren，the Senior 2 boy from Dongguan High School，Guangdong Province，is a fairly famous writer in his school．Every day，thousands of people visit his blog and read his stories about school life．And also his book has come out．

A blog was originally a website that followed headlines(标题)and articles from other websites．They were kept by volunteers and focused on(聚焦)a certain topic.

The word “blog”，is short for“weblog”．  It first came out in 1997 and by 1999 had been seen throughout newspapers and magazines．By 2004,”blog"，“blogging",” blogger”had become popular and part of modem culture．

There are many kinds of blogs in the cyber (网络)world. News blogs，for example，have developed into major information sources(来源)in recent years similar to newspapers，radio and TV. Bloggers focus on different kinds of topics from war in Iraq to oil prices．The latest information is updated(更新)every second. The results of survey have shown that news blogs are able to have a competition with TV and newspapers for news reporting.

As blogging becomes more and more popular，many teenagers are starting their own. There’re many websites，such as www. Blogchina.com， www. blogen．com， where you can create your own blog. You can Just have a try.

中央并列式通风方式的进风井和回风井间距一般不应小于（）。

A．20m

B．30m

C．50m

D．80m

请完成下列Java程序：读取自己的源文件并把它压缩成GZIP文件。 注意：请勿改动main()主方法和其他已有语句内容，仅在下划线处填入适当的语句。 import java.io.*; import java.util.zip.*; public class exl6 2 { public static void main{String[] arg) { ex16_2 obj16_2 = new ex16_2(); obj16_2.doZip("ex16_2.java","ex16_2.gzip") } public void doZip(String strIn,String strOut FileInputStream in; FileOutputStream out; GZIPOutputStream gzip; int nFileLength; byte[] barray = new byte[10]; try {in = new FileInputStream(strIn);out = new FileOutputStream(strOut);gzip = new GZIPOutputStream(out);while((nFileLength = in.read(barray, 0 barray.length)) ＞ 0) _____________________;______________________;gzip.close(); } catch(Exception e) {e.printStackTrace(); } } }

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一、根据以下资料，回答101-105题

50-59岁的外出人口中，小学及以下程度的人口占到了：

A．34%

B．45%

C．57%

D．73%