题目

 The basketball game was invented by a Canadian doctor         James Naismith. A. was called     B. to call          C. named             D. calling 答案：C  过去分词named此处用作后置定语修饰名词doctor，意为“被叫作……”，表示被动的含义。下列函数是正比例函数的是（　　）A．y=4x+1B．y=-3xC．y=-2xD．y=-x2