【简答题】The summer vacation is over. It’s true that time flies. In the vacation, the weather was very hot, but I enjoyed myself. I did my homework in the morning. I got up at 6:30a.m. and took a walk in the g...
【单选题】党的十八大报告指出,我国是世界最大发展中国家的国际地位( )。
【单选题】---Come on, boys! The bell is ringing, it’s time ______class. ---OK. Let’s______.
【简答题】今有KHC 2 O 4 ·H 2 C 2 O 4 ·2H 2 O溶液,取该溶液25.00cm 3 ,用0.1000mol·dm -3 NaOH溶液滴定,用去20.00cm 3 。若取该溶液25.00cm 3 ,用KMnO 4 溶液滴定,用去25.06cm 3 ,计算该KMnO 4 的物质的量浓度(mol·dm -3 )。
【单选题】It's eight o'clock. The students_____ an English class.
【判断题】我国社会主要矛盾虽已改变,但我国是世界最大发展中国家的国际地位没有改变。