未知题型 听力原文：What does the woman want to do?(16)A.She wants to rent a car.B.She wants to repair her car.C.She wants to sell her car.D.She wants to exchange the old car for a new onE.

未知题型 （）不是婚姻成立的特征。

多项选择题 下列函数中为周期函数的是