问题
不定项选择题
三聚氰胺(如图)是一种重要的化工原料,可用于阻燃剂、水泥减水剂和高分子合成等领域。一些不法分子却往牛奶中加入三聚氰胺,以提高奶制品的含氮量。下列说法正确的是

A.三聚氰胺的分子式为C3H6N6
B.三聚氰胺是高分子化合物
C.三聚氰胺是一种蛋白质
D.三聚氰胺分子中含有碳碳双键
答案
答案:A
三聚氰胺(如图)是一种重要的化工原料,可用于阻燃剂、水泥减水剂和高分子合成等领域。一些不法分子却往牛奶中加入三聚氰胺,以提高奶制品的含氮量。下列说法正确的是
A.三聚氰胺的分子式为C3H6N6
B.三聚氰胺是高分子化合物
C.三聚氰胺是一种蛋白质
D.三聚氰胺分子中含有碳碳双键
答案:A
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Do you like pop music? Most people do. One of the best 1 on the music scene is the New Ocean Waves. In the 2 twelve months, they've had three major 3 and made a hit CD. They're going to appear on CCTV next month. And then they're going to go on a world tour in which they will 4 in ten different cities. Be sure not to 5 them if they come to a city near you ---if you can 6 tickets. "For years, we played other people's songs", says leader singer Zhu Wen. "But now we play mostly 7 own songs. We've had a few songs in the top ten, but we really hope to have a number one hit 8 ." Good luck to the New Ocean waves. They're off to a great start. And they're really nice people. Did you know that they 9 half of the money they made to a charity for 10 children?
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