题目

7．Are your children liked by their teachers？All parents want their children to impress their teachers and succeed in sch001．You can get your children to impress their teachers by following these easy steps．Make sure they're prepared．Teachers are impressed by children coming to schoolprepared to learn．Make sure they have everything they need：pencils，textbooks，erasers，and so on．Require them to be active in class．Teach them to ask teachers questions when they don't understand something．Some children think teachers are bothered by questions，but most teachers are impress16．若Y轴表示某国人口数量，该国的人口数量变化主要受人口自然增长的影响，则（　　）A．①阶段人口出生率最低B．②阶段人口出生率显著下降C．②阶段人口死亡率显著下降D．③阶段人口自然增长率最高