在经济发展过程中，日本政府的主导作用有(  )

①限制垄断行为，保护竞争秩序

②制定经济计划，引导企业决策和行为

③采用财政和金融政策调控经济

④实施产业政策，推动产业结构向高级化发展

已知某三棱锥的三视图（单位：cm）如图所示，那么该三棱锥的体积等于（  ）

根据句意及所给的汉语，补全所缺的单词，每空限填一词。
____ The girl often helps me with my __________（最糟糕的）subject.
____ I think you made a good _________（决定）.
____ We looked at each other in _________（沉默）.
____ I had an unusual           (经历) last Sunday.
____ You shouldn’t _________ (播放) your CDs too loudly.
____ Now many students are under too much __________（压力）.
____ If Paul _________（失败）the exam again, his teacher will talk with his parents about it.
____ He had an accident. But ___________（幸运地）, he was not badly hurt.
____ It is very __________（危险的）to play football in the street.
____ He didn’t know what was __________（发生）outside.