一元二次方程 的一般形式是____．

近年来，潍坊市各中小学校非常重视对学生进行安全教育，提升学生安全素养。下列能体现我市青少年具有较高安全素养的是（    ）

世界上第一只克隆的哺乳动物克隆羊“____”于1996诞生。

阅读下面短文，从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卡将相应的字母编号涂黑。    

    Students at a primary school in Fuzhou, Hast China's Fujian Province were required to clean the school toilets to help them develop good habits. But some parents are strongly against the idea. They can't see the advantages of students doing such chores （杂亊）. They think that the school should provide students with a proper education, not the chance to be school cleaners.

    In fact, parents, schools and society play an equally （同等地）important role in developing the character of students. It is good for schools to give students such tasks, because few of the students will do them at home. Their parents want them to do homework only.

    In recent years, some parents will make mountains out of molehills when students are asked to do some chores in schools. Some complain about the teachers if their kids get hurt in schools; some even challenge the schools' teaching methods and management. As a result, many primary schools, especially those in big cities, do not let students join in outdoor activities during breaks, fearing that they might get hurt. This is bad for the development of students' best qualities.

    What the primary school in Fuzhou is doing is worth praising. Doing chores can put a sense of responsibility into students' minds and teach them the spirit of rules as well as teamwork. Also, it can make students' in﹣school experiences more meaningful.