1本单元重、难点分析本单元的重点:空间向量的运算和运算律,空间向量基本定理及其推论,两个向量的数量积,空间向量的坐标运算,夹角公式,距离公式,斜线与平面所成角的概念,二面角的概念,两个平面垂直的判定和性质,四种距离的计算等.本单元的难点:空间向量运算体系的建立,运用向 1 The emphasis and difficulty of this unit analyzes the key points of this unit: the operation and operation laws of space vectors, the basic theorem of space vectors and their inferences, the scalar product of two vectors, the coordinate operation of space vectors, the angle formula, the distance formula, and the slash The concept of the angle formed with the plane, the concept of the dihedral angle, the judgment and the nature of the two planes, the calculation of the four distances, etc. Difficulty of this unit: the establishment and application of the space vector operation system