一、选择题1.复数z=-2(sin2008°-icos2008°)在复平面内对应的点所在的象限是() (A)第一象限.(B)第二象限.(C)第三象限.(D)第四象限.2.有以下四个命题:①正四面体在桌面上的射影可能是一个正三角形;②正四面体在桌面上的射影可能是一个正方形;③球在桌面上的射影可能是一个椭圆;④球在桌面上的射影可能是一个大圆.则其中正确命题的个数是() First, multiple-choice questions 1. Complex z = -2 (sin2008°-icos2008°) The corresponding quadrant in the complex plane is () (A) first quadrant. (B) second quadrant. (C) third Quadrant. (D) Quadrant.2. There are four propositions: 1 The projection of the tetrahedron on the desktop may be a regular triangle; 2 The projection of the tetrahedron on the desktop may be a square; 3 balls on the desktop The projected on may be an ellipse; the projection of 4 balls on the desktop may be a great circle. The number of correct propositions is ()