如图，在平面直角坐标系中，直线y= $\frac{1}{2}$ x+1与抛物线y=ax²+bx﹣3交于A、B两点，点A在x轴上，点B的纵坐标为3．点P是直线AB下方的抛物线上一动点（不与A、B点重合），过点P作x轴的垂线交直线AB于点C，作PD⊥AB于点D．

如图是某一物体在不同时刻影子长度的统计图，下午一点半时这个物体影子长度大约是（　　）厘米．

完形填空

My name is Bob. I'm a middle school student. My home is about two miles 1 school. I usually leave2 school at about 6:30. I usually get to school 3. It takes me about 20 minutes. But sometimes I go there 4. It takes 5 only ten minutes.

    My friend Nick, usually goes to school by bus. He usually 6 at 5:30 every day. Then he has7 quick breakfast and goes to school at six. First he8 to the bus stop. Then the bus takes 9 to school. It usually takes him forty minutes to get to school.

     There are different 10 to get to school. But I like walking best.

在下列“温度随时间变化”的图象中，能反映晶体熔化特点的是（　　）

①强调制度与秩序

②强调天人感应、君权神授

③重视道德与人伦

④强调个人的修养与完善