2022英语周报八年级新目标scc49期答案

1+t,22解:(1)当a=时,l化x1,即y=x答案易对网y-所以曲线C的直程为千y2=4x.……(2)曲线C是以(2,0心,2为半径的圆,由|AB25案易对网得弦心距d=√4-3=1.…据时树,此时(2,0)到l的距离为1,满足条件当。≠吾时,则直线斜率存在,设为4y-1=x-1)其分则d+2=1,解得k=0,所以a=0.易对

第四部分写作第一节短文改错事Offering help is always a good tradition in ourcountries. It is believed that by heelp anothercountnhelpingperson, you are helping yourself. Helping others dodohave a significant effect on a person's happiness. Eventhough we usually feel the urge A compete with othertotaktime to assist otherseneficial to us. Besides, helping people is a goodbenefitway to build trust, particular if you never expect orparticularldemand something to be given to you in retum.anythingNowadays, a rising number of individaIs areready to assist tht others. This has resulted from awonderful community, which people live in harmonynIwherewith each other

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