题目

阅读下面短文，把A-D 四个选项填在空白处，并完成第5题。 Qu yuan, an official and a famous poet lived about 2,000 years ago. As a kind, wise and patriotic(爱国的)man, he was loved by the common people(百姓).   ___1  When people heard that Qu threw himself in the Miluo River, they were very sad and went there quickly in order to save his life.   2   In the Chinese culture, dragon means power and authority(权威), so fishermen used dragon boats to scare the fish away from Qu’s body. They also threw Zong Zi, or rice dumplings, into the water to feed the fi已知2x+3y=0，则12x2+xy+2y212x2-xy+3y2=______．