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问题 解答题
（1）解方程：x2-2x-1=0；
（2）计算：（3
2
-2
3
）2-（3
2
-2
3
）（3
2
+2
3
）
答案

（1）移项，得：x2-2x=1，

配方：x2-2x+1=2，

即（x-1）2=2，

则x-1=±

2
，

因而x1=

2
+1，x2=-
2
+1；

（2）原式=（3

2
-2
3
）[（3
2
-2
3
）-（3
2
+2
3
）]

=（3

2
-2
3
）×（-4
3
）

=-12

6
+24．

单项选择题

WebSQL is a SQL-like (26) language for extracting information from the web. Its capabilities for performing navigation of web (27) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the links in a (28) , all the pages that can be reached from a given URL through (29) that match a’ pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (30) Interface.

（27）是（）

A.browsers

B.servers

C.hypertexts

D.clients
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翻译题

英汉互译。

1．a big mountain                      2．坐出租车                        3．feel scared                    

4．be careful                            5．the man behind me                       

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