问题
选择题
下列关于油脂的叙述不正确的是
A．油脂属于酯类
B．粘有油脂的试管应该用NaOH溶液洗涤
C．是高级脂肪酸的甘油酯
D．油脂能水解，酯不能水解
答案
答案：D
D、不正确，油脂属于酯类，是高级脂肪酸的甘油酯，都能水解，在碱性条件下水解更完全，故A、B、C都正确。
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下列关于油脂的叙述不正确的是
A．油脂属于酯类
B．粘有油脂的试管应该用NaOH溶液洗涤
C．是高级脂肪酸的甘油酯
D．油脂能水解，酯不能水解
答案：D
D、不正确，油脂属于酯类，是高级脂肪酸的甘油酯，都能水解，在碱性条件下水解更完全，故A、B、C都正确。
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| During the years of depression(萧条), food and money were very hard to find and people had to trade things with each other. One day I was 1 some potatoes from Mr Miller. I noticed a small poor boy hungrily 2 a full basket of freshly picked green peas. Then I was 3 to see that Mr Miller sold the boy a bag of peas fo r just a marble (弹球). Mrs Miller, who had been standing nearby, 4_ and told me that Mr Miller loved to trade with the three boys in the village for peas, tomatoes, and other things 5 he didn't really need any marbles. I left the stand, smiling to myself, 6 by this man. Several years went by. One day I learned that Mr Miller had died. I took part in the funeral(葬礼), _7 three young men . They came over to Mrs Miller, hugged her, kissed her on the cheek, spoke with her and moved on, 8 their eyes. Our 9 came to meet Mrs Miller. I mentioned 10 she had told me about the 11 She told me, " Those three young men above were the boys I told you about. They just told me 12 they appreciated the things Jim 'traded 'with them. Now, at last, they came to pay their debt." "We've 13 had a great deal of the wealth in this world," she 14 , "but right now, Jim wouldW#W$ W%.K**S*&5︿U consider himself to be the 15 man." Then she gently lifted the 16 fingers of her husband. Resting underneath were three red marbles. At that time I realized that we would not be 17 by our words, but by our kind 18 . It is said that it takes a minute to find a 19 person, an hour to appreciate him, a day to love him, but an entire life to 20 him. | ||||
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