按草种的习性，在上海地区通常将草坪分为冷季型和暖季型两大类。
参考答案：对
Several months later, he found Mr. Jackson very difficult ________.
A．to get along with
B．getting along with
C．to get along
D．to be gotten along with
汽车电路一般采用（），汽车电源包括（）、发电机。
