题目内容
【题目】听下面一段对话,完成五道小题,每小题仅填写一个词。这段对话你将听两遍。
【答案】
(1) slowed down
(2) new ideas
(3) high-tech
(4) cartoon figures
(5) speed and tone
【解析】听力原文:
Once as a very popular and prosperous business activity, Japan's karaoke industry has slowed down. As the economic problems have been lasting, Japanese have less to sing. Karaoke companies are now trying hard to develop new ideas to attract singers back to karaoke. These include a new, high-tech machine that allows people to sing like famous singers, and "theme rooms" which are designed with the use of Asian cartoon figures, intending to attract younger crowds. The new karaoke machine is being developed by a professor from the US Massachusetts Institute of Technology. The machine uses a technology called C-Sound that automatically adjusts the speed and tone of any song being played to match the way the singer is singing. In the past, a DJ has to operate the machine and make the adjustment, but the new product is the first machine to do it automatically.
【题目】某课外活动小组准备用如图所示的装置进行实验。现有甲、乙、丙三位同学分别选择了如下电极材料和电解质溶液:
A电极 | B电极 | X溶液 | |
甲 | Cu | Zn | H2SO4 |
乙 | Pt | Pt | CuCl2 |
丙 | Fe | Cu | ? |
(1)甲同学在实验中将电键K5闭合,Zn电极上的电极反应式为________________;
(2)乙同学准备进行电解CuCl2溶液的实验,则电解时的总反应方程式为____________________;
实验时应闭合的电键组合是________。(从下列五项中选择所有可能组合,第三小题也在这五项中选择)
A.K1和K2
B.K1和K3
C.K1和K4
D.K2和K3
E.K2和K4
(3)丙同学准备在Fe上镀Cu,选择了某种盐来配制电镀液,则该盐的化学式为______________,实验时,应闭合的电键组合是___________(选项如上)。