问题
选择题
下列物质中属于纯净物的是（ ）
A．啤酒
B．蒸馏水
C．精制碘盐
D．酱油
答案
A、啤酒中含有水、乙醇等物质属于混合物，故A错；
B、蒸馏水由水一种物质组成，属于纯净物，故B正确；
C、精制碘盐中含有氯化钠、碘酸钾等物质，属于混合物，故C错；
D、酱油中含有水、色素、盐分等物质属于混合物，故D错；
故选B．
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下列物质中属于纯净物的是（ ）
A．啤酒
B．蒸馏水
C．精制碘盐
D．酱油
A、啤酒中含有水、乙醇等物质属于混合物，故A错；
B、蒸馏水由水一种物质组成，属于纯净物，故B正确；
C、精制碘盐中含有氯化钠、碘酸钾等物质，属于混合物，故C错；
D、酱油中含有水、色素、盐分等物质属于混合物，故D错；
故选B．
One day last month after I received my salary, I went shopping with my little son. 21 in the 22 store, I had my pocket 23 and my whole salary was gone with it. I was so angry that I almost lost 24 of myself. What could I do? We were not very rich. The money was really not a small sum for my family. It would 25 our life greatly. How could I tell my wife? I felt very sad and even 26 for losing the money then I got home. To make up for my 27 mistake, I gathered all my strength to give our house a thorough cleaning and then prepared a wonderful meal and cooked a special dish my wife loved to 28 her. When she came home, I 29 a smile to 30 her. She was 31 to see the neat house and delicious meal. We sat at the table and began to eat. I told my story 32 . She did not 33 .It was as if she had not heard my words. “I’ve lost my salary,” I murmured to her again. “I see,” she did not shout at me as I had 34 . She didn’t lose her 35 . So I was afraid she was trying hard to 36 her anger. A moment later, my wife was still 37 and seemed to be enjoying her favourite dish. At last I could not keep asking, “I’ve lost the money. Why not shout at me?”She 38 her eyes, looking at me and said, “oh, on the contrary, I’m thinking about how to 39 you. It’s 40 who is to blame.
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