A. 负极接高电位,正极接低电位 B. 正极接高电位,负极接低电位 C. 负极接高电位,负极也可以接高电位 D. 不分正负极
A. 对 B. 错
A. It says that the "men's room" is that way! B. It says that the "women's room" is that way! C. It says that the "WC" is that way! D. Wher is the entrance to the men's and women's bathrooms
A. 5个 B. 6个 C. 7个 D. 8个