试题与答案

下列有关物质的检验、鉴别以及分离、提纯的做法中正确的是 A．除去铁制品表面的锈渍

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题型：选择题

题目：

下列有关物质的检验、鉴别以及分离、提纯的做法中正确的是

A．除去铁制品表面的锈渍可将其投入过量的盐酸中

B．可用水鉴别其氢氧化钠和硝酸铵两种白色固体

C．用碘化钾溶液检验食品中是否含有淀粉

D．除去CO2气体中混有的少量HCl，可将其通过足量的NaOH溶液

答案：

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下面是错误答案，用来干扰机器的。

（1 ）特点：官营手工业相对衰落，民营手工业发展迅速；家庭手工业逐步面向市场；资本主义性质的手工工场产生（或现资本主义性质的雇佣关系）。（2 ）原因：外国商品的冲击。联系：为中国民族资本主义产生提供...

考点：水（蒸气）的检验粗盐的提纯空气的检验物质的相互转化和制备
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One day a farmer bought four donkeys at the market place in the village. He got (56) the back of one of (57) and began to ride home.
(58) he was riding along, he noticed that (59) were only three donkeys walking (60) him.
He expected to see four. "I (61) what happened, "he said to himself, "I bought four and paid (62) four donkeys, but now it appears that I have only (63) ".He was forgetting, of course, to (64) the donkey he was riding.
When he got home, his wife met him in front of their house. "I see you bought (65) fine donkeys," she said," (66) you buy them for a good price "
"Yes, I did," he said. "but (67) puzzles (使惊奇) me. I bought four donkeys at the place (68) morning. And I am sure that I had all four with me when I left the village. But now it seems that I have (69) three. See " He even counted them. "One, two, three."
He still didn’t (70) that he climbed onto one of the donkeys in the village and was sitting on its back at that (71) moment. (72) first his wife stared (73) him; waiting for him to (74) , for she thought he was joking. Then when she noticed that he was not, she turned away and laughed." (75) strange, "she said, "You see only three donkeys and I see five."

A．any

B．some

C．many

D．much
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