题目

 在极坐标系中，过点(2，)且与极轴平行的直线的方程是( ) A．ρcosθ＝                    B．ρsinθ＝ C．ρ＝cosθ                    D．ρ＝sinθ 答案：BB) 从方框内选出正确的短语并用其适当形式填空。1.The students _____ school because of the heavy rain yesterday morning.2.It is bad manners _____ everywhere in public places.3.It is reported that many new cars will be _____ in our city next week.4.Can you tell me whose house is _____ the supermarket?5.David found _____ animals on the hill when he went to fly kites.