实验发现，298 K时，在 FeCl3酸性溶液中加入少量锌粒后，Fe3＋立即被还原成Fe2＋。某化学兴趣小组根据该实验事实设计了如右图所示的原电池装置。下列有关说法中正确的是( )
A．该原电池的正极反应是：Zn－2e－=Zn2＋
B．左烧杯中溶液的红色逐渐褪去
C．该电池铂电极上有气泡出现
D．该电池总反应为：3Zn＋2Fe3＋=2Fe＋3Zn2＋
答案：B
正极反应是得电子的反应，A错误；左烧杯中的电极反应式为Fe3＋＋e－=Fe2＋，B正确，C错误；因为在金属活动性顺序中铁排在H的前面，在酸性溶液中不会生成Fe，D错误。
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| When the Americans were getting ready to send their first man to the moon,an old Irishman(爱尔兰人)was 1 them on TV in a hotel room.There was an Englishman in the room, 2 .And he said to the Irishman,"The Americans are very 3 , aren't they? They are going to send some people to the moon. It's a very 4 way from our world." "Oh, that's 5 ,"the Irishman answered quickly. "The Irishmen are going to send some people to the sun in months' 6 . That's much 7 away than the moon,you know. "The Englishman was very 8 when he heard this. "Oh,yes, it is," he said. "But the sun is too 9 for people to visit." The Irishman laughed and answered,"Well,the Irish are clever, too, you know. We 10 go to the sun during the day,of course. We'll go there during the night." | |||
| ( )1. A. reading ( )2. A. too ( )3. A. kind ( )4. A. short ( )5. A. nothing ( )6. A. later ( )7. A. far ( )8. A. angry ( )9. A. warm ( )10.A.don't | B.watching B.also B.bad B.long B.all B.ago B.never B.surprised B.big B.won't | C.making C.of course C.clever C.far C.wrong C.long ago C.farther C.glad C.cold C.want to | D.mending D.only D.good D.near D.great D.time D.longer D.sorry D.hot D.must |