皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
News Item One.mp3: In this section, you will hear several news items. Listen to them carefully and then answer the questions that follow. Questions 21 and 22 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news. 21. What did NASA’s Constellation Programme originally plan to do?
A.
To set up a moon colony by 2020.
B.
To send astronauts again to the moon by 2020.
C.
To continue the current shuttle missions till 2020.
D.
To create more jobs for NASA till 2020.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】单相异步电动机常用的起动方法有()和罩极式起动。
【简答题】Listening and Filling the Blanks 7
【简答题】Listening and Filling the Blanks 4
【单选题】[A20I0XL6321548]普通鼠笼式异步电动机常用的起动方法有( )
A.
全压起动和降压起动
B.
全压起动和转子串电阻起动
C.
降压起动和转子串电阻起动
D.
0
【多选题】鼠笼式异步电动机常用的起动方法有
A.
转子回路串电阻
B.
直接起动
C.
降压起动
D.
转子回路串频敏器
【简答题】Listening and Filling the Blanks 5
【简答题】Listening and Filling the Blanks 3
【判断题】三相绕线式异步电动机常用的起动方法有转子绕组串接电阻起动和转子绕组串接频敏变阻器起动两种。
A.
正确
B.
错误
【简答题】Listening and Filling the Blanks 2
【简答题】Filling the blanks with missinng words
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题