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。