搜题请搜索小程序“爱下问搜题”
问题 选择题

2009年10月16日，第11届全国运动会，在济南隆重开幕，根据济南的特点，此时，济南的天气特点是[ ]

A．高温多雨

B．秋高气爽

C．炎热干燥

D．温和湿润

答案

答案：B

填空题

看图填词。

             

     One afternoon Mary and her five-year-old brother Tom (1)            playing hide-and-seek in the street just

outside the (2)            office. Mary had covered her eyes and was counting up to ten (3)            Tom found

that the small door of the mail-box (邮箱) was left open. The postman (邮递员) had just taken all the

(4)            out and gone into the post office. Tom went into the mail-box and pull the door from inside so

hard (5)            it was locked (被锁上). When he knew what he had done, he became frightened and started (6)           . (7)           the same time Mary was (8)           for him everywhere but could not (9)           him.

When he heard her little brother crying in the mail-box, she quickly ran to tell the postman about it. The man

hurried out to open the (10)           of the mail-box and Tom got out.

查看答案
单项选择题

当异步电机转子旋转方向与同步转速方向相同，且转速低于同步转速时，异步电机处于（）状态。

A.发电机

B.电动机

C.电磁制动

D.励磁电机
查看答案