问题
单项选择题
凡为携带式或移动式电器用的插座，单相应用（）插座。
A、两孔
B、三孔
C、四孔
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
凡为携带式或移动式电器用的插座，单相应用（）插座。
A、两孔
B、三孔
C、四孔
参考答案：B
Bill and Fred were students at a university and they were friends. They didn’t have money, so when it was time their summer vacation, Bill said, “Let’s our vacation in trailer(活动房车), Fred. It is than a hotel. I can borrow my father’s trailer.” Fred was very happy, so they got into the trailer and began their vacation. They wanted early the next day to go fishing, they didn’t have an alarm clock.“ That’s , Bill,” Fred said, “ I have a good way. I’ll put bread on the roof of the trailer tonight and they will wake us up in the morning.” Bill was very , but he didn’t say anything. Fred was right. When it was at the first light, some came down to eat the bread, and their noise on the roof (屋顶) of the trailer woke them up quickly.
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