【判断题】为了保证屋面泛水的防水性能,避免卷材架空或折断,需要加铺一层卷材。
【单选题】听力原文:A: After the way it is being used, the photocopier is not going to make it through the rest of the year. B: The year! It's supposed to be good for four! The tone of the man is that of______.
【简答题】直流电动机的主磁极是由()和励磁绕组组成。
【简答题】The Confucius Institutes aim at promoting the Chinese language and culture overseas through Internet or ___________ courses.