阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中单词的正确形式填空
    Do you know how to be a top student? Top students are decided by a new way now. New rules for middle school students ____ (come) out in March. The best students should not only have good grades. You'll be a top student ____  you follow the new rules.____  (one), you need to be honest. You should never copy others’ homework. Second, good students love animals and care____ other people. They try to do something to protect animals, too. Are you one of them? Third, you should learn that teamwork____  important. So be friendly to the people you are with and it can make your team stronger.

在相同时刻太阳光线是平行的，如果高1.5米的测杆影长3米，那么此时影长30米的旗杆的高度为（　　）

—_______.

①经济建设支出增加→社会总供给增加→企业生产规模扩大→国家经济增长

②降低创新型企业税收标准→企业税负减轻→研发投入增加→企业实现转型

③银行降低存贷款利率→企业融资成本减轻→研发投入增加→企业从供给低端迈向中高端

④政府加大公共服务投入→公共产品和服务总需求增加→提供公共产品的企业生产扩大→公共需要得到更好满足，实现经济社会发展