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简述JSP和Servlet的区别以及各自适用的情况

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简述过滤器的方法及它们的运行顺序，列举一个过滤器的典型应用

以下是Filter代码段：public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {chain.doFilter(request, response);}其中chain.doFilter(request, response);代码的作用是什么？

There is ____ bridge over the river.

A. a stone old fine
B. an old stone fine
C. a fine old stone
D. an old fine stone

It's surprising that little children could do much work.

A. such; so
B. so; such
C. such; such
D. so; so