2022年山东省普通高中学业水平等级考试·仿真冲刺卷XGK-山东(一)1地理试题 答案

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4.B【解析】若z=ai(a≠0),则z2=-a2<0,故A正确;但当z=a b(a≠0,b≠0)时,则z2=a2-b2 2ab是虚数,不能比较大小,故B错误;设z=a hi(a,b∈R),若x2=(a bi)2=a2-b2 2abi≥0,则ab=0,∴b=0,即z是实数,故C正确;若a2-b2≥0,(atbi)2=a2-b 2abi

应用文Possible version:Many teenage champions have stood out in the Beijing Winter Olympics.Their self-madeaccomplishments are an incredible source of inspiration for anyone who aspires to fulfillment in life.The stories coming out of the champions have much in common.First,they go all out to be excellent,which is the universal quality that will pay off in the long-term.Besides,faced with one failure after another,they never give up,taking every setback in stride.In the course of the pursuit of our dreams,we also need aclear goal to keep us moving forward as well as the resilience to deal with stress and failure.A journey of 1,000 miles begins with one step.I have every ground to believe persistence and the longingfor excellence will help us teenagers win through.