读课本冀教版八年级英语上册Unit7 《Enjoy your hobby 》P66 的课文，回答下列问题。

1. what's Paul's hobby?

    _________________________

2. What does he do with his rockets?

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3. Does he have a collection of his rockets?

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4. launch( 第三人称单数)

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结构化分析方法是面向( )的自顶向下、逐步求精进行需求分析的方法。

A．对象

B．数据结构

C．数据流

D．目标