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\((1)\)因式分解：\(-xy{{z}^{2}}+4xyz-4xy\) \((2)\)因式分解：\(9{{(m+n)}^{2}}-{{(m-n)}^{2}}\) \((3)\)解方程：\(\dfrac{x}{x-3}+\dfrac{2-x}{3-x}=1\)

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\((1)\)若要使分式\(\dfrac{3}{4+x}\)有意义，则\(x\)的取值范围是________ \((2)\)数学在我们的生活中无处不在，就连小小的台球桌上都有数学问题\(.\)如图，\(∠1=∠2\)，若\(∠3=30^{\circ}\)，为了使白球反弹后能将黑球直接撞入袋中，那么击打白球时，必须保证\(∠1=\)______ \((3)\)如图，在\(\triangle ABC\)中，\(D\)是\(BC\)边上的中点

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如图，点\(E\)是\(BC\)的中点，\(AB⊥BC\)，\(DC⊥BC\)，\(AE\)平分\(∠BAD\)，下列结论：\(①∠AED=90^{\circ}②∠ADE=∠CDE ③DE=BE④AD=AB+CD\)，四个结论中成立的是( )

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如图，在\(\triangle ABC\)中，\(∠A=20^{\circ}\)，\(∠ABC\)与\(∠ACB\)的角平分线交于\(D_{1}\)， \(∠ABD_{1}\)与\(∠ACD_{1}\)的角平分线交于点\(D_{2}\)，依此类推，\(∠ABD_{4}\)与\(∠ACD_{4}\)的角平分线交于点\(D_{5}\)，则\(∠BD_{5}C\)的度数是\((\) \()\)

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\(10.\)如图，把\(\triangle ABC\)纸片沿\(DE\)折叠，当点\(A\)落在四边形\(BCDE\)的外部时，则\(∠A\)与\(∠1\)和\(∠2\)之间有一种数量关系始终保持不变，请试着找一找这个规律，你发现的规律是\((\) \()\)

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\(8.\)如图，\(AB=AC=AD\)，若\(∠BAD=80^{\circ}\)，则\(∠BCD=(\) \()\)

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图\((1)\)是一个长为\(2a\)，宽为\(2b(a > b)\)的长方形，用剪刀沿图中虚线\((\)对称轴\()\)剪开，把它分成四块形状和大小都一样的小长方形，然后按图\((2)\)那样拼成一个正方形，则中间空的部分的面积是\((\) \()\)

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若分式\(\dfrac{{{x}^{2}}-4}{2x-4}\)的值为零，则\(x\)等于\((\) \()\)

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如图，点\(A\)在\(DE\)上，\(AC=CE\)，\(∠1=∠2=∠3\)，则\(DE\)的长等于( )

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下列从左到右的变形，属于分解因式的是( )

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一个三角形的两边长为\(3\)和\(7\)，第三边长为偶数，则第三边为\((\) \()\)

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在平面直角坐标系中，点\(P(3,-2)\)关于\(y\)轴的对称点在( )

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计算\({\left(-2{a}^{2}b\right)}^{3} \)的结果是\((\) \()\)

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下面\(4\)个图案，其中不是轴对称图形的是( )

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My little sister isn’t old enough to look after_____(她).

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There are not enough drinks and_______(零食) here. Could you buy some?

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Everyone should know the______(重要) of studying hard.

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Most of the people are_____(反对) building a zoo in the town.

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American usually eat with folks and____(刀).

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A篇为判断正（A）误( B) A A kind of little cars may be seen in the streets in the future .People will like this kind of small cars better than the big ones. The car is as small as a bike but it can carry two people in it .Everybo

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