广场线形设计能使车辆顺利进入车道，应有足够的空间，广场加宽部分其功能是（）。
A. 供车辆加速；
B. 保证车辆减速；
C. 车辆安全；
D. 车辆缓冲过渡；
E. 车辆等待缴费
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物理常数在一定程度上反映了（）的特征，所以，物理常数是有机化合物的特性常数。
A. 原子结构
B. 分子结构
C. 物理性质
D. 核外电子层结构
根据茶的水土相宜性，虎跑泉适宜泡龙井茶。
A. 正确
B. 错误
Which the three are true about servlet filters？（）
A filter must implement the destroy method
B. A filter must implement the doFilter method
C. A servlet may have multiple filters associated with it
D. A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface
E. A filter that is part of a filter chain passes control to the next filter in the chain by invoking the filterChain forward method
For each element in the web application deployment descriptor， multiple instances of a filter may be created by the web container
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