单项选择题

列写状态方程关键一步是（）

A．列单电容树支割集的KCL方程和单电感连支回路的KVL方程
B．列单电感连支割集的KCL方程和单电容树支回路的KVL方程
C．列单电感树支割集的KCL方程和单电容连支回路的KVL方程
D．列单电容树支割集的KVL方程和单电感连支回路的KCL方程

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在Servlet过滤器的生命周期方法中，每当传递请求或响应时，Web容器会调用( )方法。

A．init
B．service
C．doFilter
D．destroy

单项选择题

There are three kinds of goals: short-term, medium-range and long-term goals. Short-range goals are those that usually deal with current activities, which we can apply on a daily basis. Such goals can be achieved in a week or less, or two weeks, or possible months. It should be remembered that just as a building is no stronger than its foundation ,out long-term goals cannot amount to very munch without the achievement of solid short-term goals. Upon completing our short-term goals, we should date the occasion and then add new short-term goals that will build on those that have been completed. The intermediate goals build on the foundation of the short-range goals. They might deal with just one term of school or the entire school year, or they could even extend for several years. Any time you move a step at a time, you should never allow yourself to become discouraged or overwhelmed. As you complete each step, you will enforce the belief in your ability to grow and succeed. And as your list of completion dates grow, your motivation and desire will increase. Long-range goals may be related to our dreams of the future. They might cover five years or more. Life is not a static thing. We should never allow a long-term goal to limit us or our course of action. New short-term goals are built upon______. A、two years B、long-term goals C、current activities D、the goals that have been completed

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