题目

听下面一段对话,回答小题。 (1) What type of music does the boy like most? A . Jazz B . Rock C . Folk (2) The girl often listens to the music before ________. A . going to school B . having dinner C . going to bed (3) Where are they going next weekend? A . To England. B . To a rock concert. C . To the Rolling Stones' home. 答案:B C B如图所示,a、b是两根石墨棒。下列叙述正确的是 [     ]A.a是正极,发生还原反应 B.b是阳极,发生氧化反应 C.稀硫酸中硫酸根离子的物质的量不变 D.往滤纸上滴加酚酞试液,a极附近颜色先变红
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