3. 下列各组物质充分反应后,加热蒸干并在300℃灼烧至固体质量不变,最终残留固体为纯净物的是 ( )
A.在溴化钠和碘化钾的混合溶液中通入过量的氯气
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C.向硫酸亚铁溶液中加入适量的氢氧化钠溶液至不再产生沉淀
D.等物质的量浓度、等体积的硫酸铵与氯化钡溶液相混合
第一节:短文改错(共10小题;每小题1分,满分10分)
假如英语课上老师要求同学们交换修改作文,请你修改你同桌写的一篇作文。文中共有10处语言错误, 要求你在错误的地方增加、删除或修改某个单词。
增加:在缺词处加一个漏字符号(∧),在其下面写上该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线,并在该词下面写上修改后的词。
注意:1. 每处错误及其修改均仅限一词;
2.只允许修改10处,多者(从11处起)不记分。
例如:It was very nice to get invitation to spend ∧ weekend with you. Luckily
I was completely free then, so I’ll to say “yes”. I’ll arrive in Bristol at am around 8 pm in Friday evening. on |
A man was driving on the road. Suddenly his car stopped. He got out of the car tried to find out the trouble. “It’s the motor.” said the voice behind him. He was surprising and turned around.
But he saw only an old horse. “Did you say something?” he asked. “ I said you should check yours motor,” the horse replied. The man rushed to the nearer house. With a very excited voice, he told the farmer had happened. The farmer, therefore, showed no sign of excitement. He explained , “He didn’t know anything about cars. He can only repeat what I often say.”