题目

模拟八 单词填写, 用括号内所给单词的正确形式填空。 1. Russian was taught in the middle of the_______ (nineteen) century in China. 2. The sport is too hard, so there are few_______ (win) in the race. 3. Dick won the match. He thought that was one of the_______ (excite) moments in his life. 4. We must try our best so that we can finish the task_______ (success). 5. Maria is sending an e-mail to a friend of_______ (she) in England. 6. Oh, this is really a big store. Do you know when it_______ (build)? 7. A:Why were you absent this morning? B:I went to hospital. I将金属铜进行如下实验：向得到的C溶液中逐滴滴加Ba(OH)2溶液，滴加Ba(OH）2溶液的质量与产生沉淀的质量关系如图所示。请回答：（1）写出Cu→A的化学方程式（2）写出C溶液中溶质的化学式