Ӣҽ > ѧ > Ŀ

ӯӯͬѧҪ֤⡰Ա߷ֱȵıƽıΡȷ,ó߹ͼ1ıABCD,д²֪֤

֪:ͼ1,ıABCD,BC=AD,________________________

֤________________________

(1),ȫ֪֤

(2)ӯӯ뷨д֤

(3)֤Ϊ________________________

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Ŀѧ ԴĴʡĩп꼶ѧԾ ͣ

ⲻʽ飬ѽ⼯ϱʾ

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Ŀѧ Դʡ˳2018пѧԾ ͣѡ

塤һڼ䣬Ļƹٲοǰ.ͳƣijʱ÷羰ԼΪˣÿѧʾΪ

A. B. C. D.

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Ŀѧ Դʡ2017-2018ѧ꼶ѧڵڶν׶οѧԾ ͣѡ

ͼƽı ABCD У EΪ BC һ㣬 AE ΪAEFG Ķ

A. B. C. D.

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Ŀѧ Դʡ2017-2018ѧ꼶ѧڵڶν׶οѧԾ ͣѡ

߶УԹֱεǣ

A. 1.522.5 B. 456 C. 234 D. 13

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Ŀѧ Դ2017-2018ѧ֣ݰ꼶ĩѧԾο ͣ

ijдӽ11ˮ۸,ÿˮ,Сȥ12µˮ15Ԫ,7µˮ30Ԫ.֪Сҽ7µˮȥ12µˮ5m3,нˮļ۸.Ҫϵ,(дһ)_____________

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Ŀѧ Դ2017-2018ѧ֣ݰ꼶ĩѧԾο ͣѡ

ͼʾOPƽ֡AOBPAOAPBOBֱΪABн۲һ( )

A. PA=PB B. POƽ֡APB

C. ABֱƽOP D. OA=OB

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Ŀѧ Դ˽̰꼶ϲһԪһη̵Ԫ ͣѡ

ij26ˣÿÿ800ݶ1000ĸ1ݶҪ2ĸΪʹÿݶĸպף谲xݶзȷǣ

A2100026x=800x B100013x=800x

C100026x=2800x D100026x=800x

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Ŀѧ Դʦ꼶ѧϲвԾ ͣ

(1)(23) (2)( )223.

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