八年級寒假作業(yè)答案-在線瀏覽
2024-09-14 13:55本頁面
【正文】 34頁 CDAB 60176。根據(jù)題意，則DE垂直平分BO所以，DB=DO設(shè)OD=x,則DB=x，AD=8x因為OABC是矩形，所以4（平方）+（8X）（平方）=X（平方） *（平方）就是那個小2 X=5所以O(shè)D=5 (2)菱形證：因為角DBO=角BOE又，DE垂直平分BO所以DB=OE=OD=5所以是菱形 (3)設(shè)F（m,n)則m（平方）+n（平方）=4（平方） (5m)（平方）+n（平方）=3（平方）解得F（,)E()帶入方程y=ax+b 0=5a+b=+b解得a=三分之四b=三分之二十y=三分之四x三分之二十 英語：P37happy1一what a melody(悅耳) song it is!what a fast boy he is !what a heavy girl she is !what a beautiful school it is !what a good boy he is !what a beatific(幸福) boy he is!二is cleanedwere taken is makenwas showedare inviten wasn39。 was found三turtletiger japanMexicotiger sierra leone：better best havier heavisetmore most older oldestbigger biggest more expensive mostexpensive more smart most smart better known best knownmore badly most badly less leasmore carefully most carefully fewer fewestmore slowy most slowy thinner thinnestmore healthy most healthy more easily most easilyhotter hoyyest oftener oftenest farer farest larger largest P40一：plan to do 計劃做某事 He planned on taking hisvacation in July.hope to do 希望做某事 We hope to see you soon.agree to do 同意做某事 No results found foragree to do. refuse to do 拒絕
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