【判断题】白口铸铁与灰口铸铁由同样的相组成。( )
【单选题】以下不属于“五位一体”总体布局的是______。
【简答题】听下面一段对话,完成1-3题。 1. How is the man going to Beijing Wildlife Park tomorrow? [ ] A. By bus. B. In a car. C. On foot. 2. Where and when are they going to meet? [ ] A. At his uncle's home at 9 a.m...
【简答题】变压器的n=10,如果U2=220V,则U1的值为() A22伏 B2200伏 C其它
【简答题】听下面一段材料,回答第1至5题。 1. What does the woman wish to do? A. Sell caps for small boys. B. Exchange the cap for a larger one. C. Make this cap a little smaller. 2. Where are they probably talking? A. Outside...
【单选题】如果U={a,b,c,d,e},M={a,c,d},N={b,d,e},其中U为全集,则∁ U M∩∁ U N等于( )