优优班--学霸训练营 > 知识点挑题
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            • 1.
              在长方体\(ABCD-A_{1}B_{1}C_{1}D_{1}\)中,\( \overrightarrow{BA}+ \overrightarrow{BC}+ \overrightarrow{DD_{1}}=(\)  \()\)
              A.\( \overrightarrow{D_{1}B_{1}}\)
              B.\( \overrightarrow{D_{1}B}\)
              C.\( \overrightarrow{DB_{1}}\)
              D.\( \overrightarrow{BD_{1}}\)
            • 2.
              如图:在平行六面体\(ABCD-A_{1}B_{1}C_{1}D_{1}\)中,\(M\)为\(A_{1}C_{1}\)与\(B_{1}D_{1}\)的交点\(.\)若\( \overrightarrow{AB}= \overrightarrow{a}\),\( \overrightarrow{AD}= \overrightarrow{b}\),\( \overrightarrow{AA_{1}}= \overrightarrow{c}\),则下列向量中与\( \overrightarrow{BM}\)相等的向量是\((\)  \()\)
              A.\(- \dfrac {1}{2} \overrightarrow{a}+ \dfrac {1}{2} \overrightarrow{b}+ \overrightarrow{c}\)
              B.\( \dfrac {1}{2} \overrightarrow{a}+ \dfrac {1}{2} \overrightarrow{b}+ \overrightarrow{c}\)
              C.\(- \dfrac {1}{2} \overrightarrow{a}- \dfrac {1}{2} \overrightarrow{b}+ \overrightarrow{c}\)
              D.\( \dfrac {1}{2} \overrightarrow{a}- \dfrac {1}{2} \overrightarrow{b}+ \overrightarrow{c}\)
            • 3.
              直三棱柱\(ABC-A_{1}B_{1}C_{1}\)中,若\( \overrightarrow{CA}= \overrightarrow{a}\),\( \overrightarrow{CB}= \overrightarrow{b}\),\( \overrightarrow{CC_{1}}= \overrightarrow{c}\),则\( \overrightarrow{A_{1}B}=(\)  \()\)
              A.\( \overrightarrow{a}+ \overrightarrow{b}- \overrightarrow{c}\)
              B.\( \overrightarrow{a}- \overrightarrow{b}+ \overrightarrow{c}\)
              C.\(- \overrightarrow{a}+ \overrightarrow{b}+ \overrightarrow{c}\)
              D.\(- \overrightarrow{a}+ \overrightarrow{b}- \overrightarrow{c}\)
            • 4.

              三棱柱\(ABC-{{A}_{1}}{{B}_{1}}{{C}_{1}}\)中,若\(\overrightarrow{CA}=\overrightarrow{a},\overrightarrow{CB}=\overrightarrow{b},\overrightarrow{C{{C}_{1}}}=\overrightarrow{c}\),则\(\overrightarrow{{{A}_{1}}B}=\)

              A.\(\overrightarrow{a}+\overrightarrow{b}-\overrightarrow{c}\)
              B.\(\overrightarrow{a}-\overrightarrow{b}+\overrightarrow{c}\)        

              C.\(-\overrightarrow{a}+\overrightarrow{b}-\overrightarrow{c}\)
              D.\(-\overrightarrow{a}+\overrightarrow{b}+\overrightarrow{c}\)
            • 5. 如图,四面体\(ABCD\)中,点\(E\)是\(CD\)的中点,记\( \overrightarrow{AB}= \overrightarrow{a}\),\( \overrightarrow{AC}= \overrightarrow{b}\),\( \overrightarrow{AD}= \overrightarrow{c}\),则\( \overrightarrow{BE}=(\)  \()\)
              A.\( \overrightarrow{a}- \dfrac {1}{2} \overrightarrow{b}+ \dfrac {1}{2} \overrightarrow{c}\)
              B.\(- \overrightarrow{a}+ \dfrac {1}{2} \overrightarrow{b}+ \dfrac {1}{2} \overrightarrow{c}\)
              C.\( \dfrac {1}{2} \overrightarrow{a}- \overrightarrow{b}+ \dfrac {1}{2} \overrightarrow{c}\)
              D.\(- \dfrac {1}{2} \overrightarrow{a}+ \overrightarrow{b}+ \dfrac {1}{2} \overrightarrow{c}\)
            • 6.

              以下四个命题中,正确的是

              A.若\(\overrightarrow{OP}=\dfrac{1}{2}\overrightarrow{OA}+\dfrac{1}{3}\overrightarrow{OB}\),则\(P\)、\(A\)、\(B\)三点共线
              B.向量\(\{\overrightarrow{a},\overrightarrow{b},\overrightarrow{c}\}\)是空间的一个基底,则\(\{\overrightarrow{a}+\overrightarrow{b},\overrightarrow{b}+\overrightarrow{c},\overrightarrow{c}+\overrightarrow{a}\}\)构成空间的另一个基底
              C.\(|(\overrightarrow{a}\cdot \overrightarrow{b})\cdot \overrightarrow{c}|=|\overrightarrow{a}|\cdot |\overrightarrow{b}|\cdot |\overrightarrow{c}|\)
              D.\(\triangle ABC\)是直角三角形的充要条件是\(\overrightarrow{AB}\cdot \overrightarrow{AC}=0\)
            • 7.

              点\(P(1,2,3)\)关于坐标平面\(xoy\)对称的点的坐标是\((\)  \()\) 

              A.\((-1,-2,3)\)   
              B.\((-1,2,3)\)    
              C.\((1,-2,3)\)      
              D.\((1,2,-3)\)
            • 8.
              如图,空间四边形\(OABC\)中,\( \overrightarrow{OA}= \overrightarrow{a}\),\( \overrightarrow{OB}= \overrightarrow{b}\),\( \overrightarrow{OC}= \overrightarrow{c}\),点\(M\)在线段\(OA\)上,且\(OM=2MA\),点\(N\)为\(BC\)的中点,则\( \overrightarrow{MN}=(\)  \()\)
              A.\(- \dfrac {2}{3} \overrightarrow{a}+ \dfrac {1}{2} \overrightarrow{b}+ \dfrac {1}{2} \overrightarrow{c}\)
              B.\( \dfrac {1}{2} \overrightarrow{a}- \dfrac {2}{3} \overrightarrow{b}+ \dfrac {1}{2} \overrightarrow{c}\)
              C.\( \dfrac {1}{2} \overrightarrow{a}+ \dfrac {1}{2} \overrightarrow{b}- \dfrac {1}{2} \overrightarrow{c}\)
              D.\( \dfrac {2}{3} \overrightarrow{a}+ \dfrac {2}{3} \overrightarrow{b}- \dfrac {1}{2} \overrightarrow{c}\)
            • 9.

              已知数列\(\left\{ {{a}_{n}} \right\}\)是等差数列,\(A\)、\(B\)、\(C\)、\(D\)四点共面\((\)任意三点不共线\()\),\(O\)是空间中任意一点,且满足\(\overrightarrow{OA}={{a}_{5}}\overrightarrow{OB}+{{a}_{7}}\overrightarrow{OC}+{{a}_{9}}\overrightarrow{OD}\),则数列\(\left\{ {{a}_{n}} \right\}\)的前\(13\)项和为\((\) \()\)

              A.\(13\)   
              B.\(\dfrac{13}{3}\)
              C.\(\dfrac{13}{2}\)
              D.\(\dfrac{13}{4}\)
            • 10. 如图,空间四边形\(OACB\)中,\( \overrightarrow{OA}= \overrightarrow{a}\),\( \overrightarrow{OB}= \overrightarrow{b}\),\( \overrightarrow{OC}= \overrightarrow{c}\),点\(M\)在\(OA\)上,且\( \overrightarrow{OM}= \dfrac {2}{3} \overrightarrow{OA}\),点\(N\)为\(BC\)中点,则\( \overrightarrow{MN}\)等于 ______ \(.(\)用向量\( \overrightarrow{a}\),\( \overrightarrow{b}\),\( \overrightarrow{c}\)表示\()\)
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