亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數學考題練習:若互不相等的四條線段的長a、b、c、d滿足,m!

數學考題練習:若互不相等的四條線段的長a、b、c、d滿足,m

更新時間:2024-01-12 16:38:48作者:貝語網校

若互不相等的四條線段的長a、b、c、d滿足,m是任意實數,則下列各式中,一定成立的是

A.

B.

C.

D.

試題答案

D

試題解析

熟練掌握比例和分式的基本性質,進行各種演變.

解答:A,根據分式的基本性質,錯誤;

B,右邊的分子應是d+m,錯誤.

C,根據乘法交換律,交換兩內項的位置,應是,錯誤;

D,若,根據分式的合比性質,得①,②.①÷②,得.正確.

故選D.

點評:根據比例的性質能夠靈活對一個比例式進行變形.

為您推薦

數學考題練習:邊長為4的等邊三角形的面積為________.

邊長為4的等邊三角形的面積為________.

2024-01-12 16:38

數學考題練習:如圖所示,已知△ABC和△BDE都是等邊三角形

如圖所示,已知△ABC和△BDE都是等邊三角形,且A、B、D三點共線.下列結論:①AE=CD;②BF=BG;③HB平分∠AHD;④∠AHC=60°,⑤△BFG是等邊三角形;⑥FG∥AD.其中正確的有A.3個B.4個C.5個D.6個

2024-01-12 16:38

數學考題練習:△ABC中,∠A=θ-α,∠B=θ,∠C=θ+

△ABC中,∠A=θ-α,∠B=θ,∠C=θ+α,0°<α<θ<90°.若∠BAC與∠BCA的平分線相交于P點,則∠APC=A.90°B.105°C.120°D.150°

2024-01-12 16:38

數學考題練習:下列各式從左到右的變形,是因式分解的是

下列各式從左到右的變形,是因式分解的是A.m(a+b)=ma+mbB.ma+mb+1=m(a+b)+1C.(a+3)(a-2)=a2+a-6D.x2-1=(x+1)(x-1)

2024-01-12 16:38

數學考題練習:早晨8點多鐘,有兩輛汽車先后離開甲地向乙地開去

早晨8點多鐘,有兩輛汽車先后離開甲地向乙地開去,這兩輛汽車的速度相同.8點32分,第一輛汽車行駛的路程是第二輛汽車的3倍;到了8點39分,第一輛汽車行駛的路程是第二輛的2倍.那么,第一輛汽車是幾點幾分離開甲地的?

2024-01-12 16:38

數學考題練習:兩條平行線被第三條直線所截,則

兩條平行線被第三條直線所截,則A.一對內錯角的平分線互相平行B.一對同旁內角的平分線互相平行C.一對對頂角的平分線互相平行D.一對鄰補角的平分線互相平行

2024-01-12 16:38

加載中...
主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |