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2019ҽƸٴҽѧ˿˼·

2019-06-11 15:28:37 Դ

༭ҽƸQQȺ

༭ҽƸ

 

֪ʶɽҵλеҪ֣ٵڱԵа˹Ŀˡڹ֪ʶ漰֪ʶdz㣬йصΪܽ˺֪ܶʶ㣬Ҽ䣬ϣܰ߸ϰЧʡ2019ҵλƸϣһԻᡣ

ٴִҵҽʦԴҪλյ֪ʶ˵½ڵĿ˼·ͨ“˻Լ˵”ж“˳̶ȵжϻ߽лҪҺļ”Ĵ⡣ôǸɽй˲ʦһڱ½ڵ˿ĽӦν˼

һ⣺

ɻش12⡿У40ꡣ60kg֫ؽ¡֫ϥؽˡ˱ֺɫˮףƤʪдСһˮݣ֮ʹ

1.û˵Ϊ( )

A.20%

B.38%

C.37%

D.19%

E.18%

1.𰸡D

ԿĿĿ˻ߵ㡣Ҫͨλʱй¾ŷֲַм㡣Ǿһһ¹й¾ŷַ֪ʶ㡣

λ ռ% ռͯ% ע
ͷ: 沿
3
3 9×1 3
9+(12~) ͯͷ󣬹ͷ ڳ˻ +(12-)
˫֫:˫ϱ
˫ǰ
˫
7
6 9×2 5
9×2
:ǰ ɺ
13
13 9×3 1
9×3
˫֫:˫
˫
˫С
˫
5
21 9×5+1 13
7
9×5+1~(12~) ͯ֫С˫ ֫ڳ˻ -(12-)

Ŀиû߷Ҽؽ˼ΪҲ֫֡ǰۡ֫Ϊ9%Ҳϥؽ·˼ΪҲСȼ㷢ˣΪ10%˸û˵Ϊ19%

2.ûߵһҪҺΪ

A.2750ml

B.3140ml

C.1750ml

D.3750ml

E.1140ml

2.𰸡D

ԿڶĿĿǶԸû߷˺ˮҺ㡣ÿҪͨԻߵм󣬸Ӧļ㹫ʽߵһʧˮҺ

һʧˮҺ㹫ʽΪ××ϵ(ϵΪ1.5;ͯΪ2.0)ͨ㹫ʽûߵһʧˮҺΪ1710ml

ÿˮΪÿ2000mlڶ˻߽вҺƵʱ˲Ϊ˶ʧҺ⣬Ҫ仼ÿҪˮ˸ûߵĵһ첹Һ=ʧˮҺ+ÿˮҺΪ3710mlôĿӽĴΪD

ϢҽƸƵ


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