下列物质中，不属于有机化合物的是
A．糖类
B．蛋白质
C．甲烷
D．二氧化碳
答案：D
A、糖类是含有碳元素的化合物，属于有机物，故A不符合题意；
B、蛋白质是含有碳元素的化合物，属于有机物，故B不符合题意；
C、甲烷是含有碳元素的化合物，属于有机物，故C不符合题意；
D、二氧化碳虽然是含有碳元素的化合物，但由于具有无机物的特点，应属于无机物，故D符合题意．
故选D．
阅读下面短文，掌握其大意，然后从16--35各题所给的四个选项A、B、C、D中，选出最佳选项。 To develop her students' spelling skills, Mrs Hardy held a spelling competition in her class．The two 16 spellers would compete in the school spelling competition with other 17 from the fourth, fifth and sixth grades． Spelling was Jasmine's 18 subject and books were her best friends． 19 would allow her to 20 into the sea, find buried treasure, 21 meet the mean man Mr Grandet（葛朗台）．Fairy tales 22 her to dream of being a princess． The day came for Mrs Hardy to 23 the result of the competition．Jasmine sat in her seat．Finally Mrs Hardy announced that Reece Bradley and Jasmine Russell would 24 in the school final spelling competition． Smiling 25 , Jasmine looked at Reece, but he 26 her by frowning（皱眉） as if he were 27 to take part in the competition． “Way to go, Jasmine,” Rashad, Jasmine's another classmate, said with a playful push to her arm．“Do you think you have a 28 of winning the competition?” Jasmine 29 , “My Aunt Lucy says anything can be got by 30 hard．I'm going to study the word list till my 31 stop working!” During the break, Jasmine, Rashad and Reece met on the basketball court for a game of Horse．Jasmine said, “Let's 32 for the competition by spelling bigger words!” “Like what?” Rashad asked．Jasmine smiled．“Like antidisestablishmentarianism．” Reece rolled his eyes and asked．“Anti—what?” Jasmine 33 the word, trying not to laugh．“You made that 34 ,” Rashad said．“Anything can be got by working hard．This is__ 35 everybody should believe in．
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