题目

Eric just passed his driving test, so he can’t drive so ____________as his father.A.good B.better C.well 答案：【答案】C【解析】略关与直线m，n与平面M，N，有以下四个命题：（1）若m//M，n//N且M⊥N，则m//n；（2）若m⊥M，n⊥N，且M⊥N，则m⊥n；（3）若m⊥M，n//N且M//N，则m⊥n；（4）若M//N且m与平面M所成的角等于n与平面N所成的角，则m//n.其中真命题的序号是________。