下面说法中错误的是( )。A．凡是语法错误，都属于编译错误 B

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问题单项选择题

下面说法中错误的是( )。

A．凡是语法错误，都属于编译错误

B．异常是程序无法控制的

C．对程序而言，一般有编译错误和运行错误两类

D．Java语言中，异常为一种对象

答案

参考答案：B

解析：异常是在程序编译或运行中所发生的可预料或不可预料的异常事件，是不可避免的。异常处理，将错误处理的控制流从正常运行的控制流中分离开，使我们再也不用检查一个特定的错误，并在程序的多处地方对其进行控制。

阅读理解

阅读对话，回答问题。

A: Hello. I'm from a big country. Our capital is Ottawa. The Rocky Mountains are in our country. We speak

English and French.

B: Hi! Look at the flag of our country. It's red. There are five stars on the flag. They are yellow.

C: The flag of our country has fifty stars. They are white. Canada is north of our country.

D: In our country, we speak English. Our country is west of China. We have a king or a queen. They live in

Buckingham Palace.

1. A's country is ______________.

2. B is from ______________.

3. The 2012 Olympic Games will be held in ______________'s country. ______________ is the capital city.

4. Obama is ______________'s country's president. He lives in the ______________ ______________.

单项选择题

实现“从学生信息表中找出性别为女的学生姓名”的SQL语句是

A．SELECT * FROM s

B．SELECT * FROM s WHERE sex=’女’

C．SELECT sname FROM s WHERE sex=’女’

D．SELECT * FROM s WHERE grade="