【简答题】转子轴作径向圆跳动检测时,测试值是 mm。
【单选题】Où vas-tu ? Je vais magasin.
【简答题】钾是活泼的碱金属,钾和氧有氧化钾(K 2 O)、过氧化钾≤K 2 O 2 )和超氧化钾(KO 2 )等多种化合物。 (1)钾和硝酸钾反应可制得K 2 O(10K+2KNO 3 = 6K 2 O+N 2 ),39.0 g钾与10.1 g硝酸钾充分反应生成K 2 O的质量为________g。 (2)某过氧化钾样品中氧的质量分数(杂质不含氧)为0.28,则样品中K 2 O 2 的质量分数为______...
【简答题】Dear Peter, School is going well. I am so 36 and I have little time to go and play 37 the weekend. I always go to the library to 38 newspapers or study English. If you’re free, you can come to 39 me. ...
【简答题】改错(满分10分) I sometimes argue with my mother about if I can watch TV after school. She holds the view which Senior students have to devote all their time to work hard at their lessons. It seems to me th...
【单选题】下列句子中,哪一个主语人称代词与动词变位不匹配?
D.
Tu vas au supermarché ?
【单选题】中国共产党党徽为____和锤头组成的图案。