问题
多项选择题
保温材料的（），必须符合设计要求。
A.表观密度或干密度
B.导热系数
C.压缩强度或抗压强度
D.燃烧性能
答案
参考答案：A, B, C, D
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保温材料的（），必须符合设计要求。
A.表观密度或干密度
B.导热系数
C.压缩强度或抗压强度
D.燃烧性能
参考答案：A, B, C, D
| 根据短文内容从下面方框内的七个选项中,选出五个还原的原文中,使原文句子通顺,结构完整. | |
| 1._It has around 3 billion fans - nearly half the world's population! And about 300 million people play this game. That's 4 percent of the world' s population! 2._Many people in old days played early forms of his modern game. Cu ju (蹴鞠) a ball-kicking game in China, was reported as early as 2500 B.C. Around the same time in Greece people were also playing a similar ball game without using their hands. But modern soccer didn't become official (官方的 ) until 1863. An Englishman called Cobb Morley introduced the idea of a soccer association (联盟). 3___. From then on, other associations in the countries were set up. They came together-to make up the FIFA, which organizes the World Cup. It's not easy to tell what makes soccer so popular. 4.___ Soccer needs only two feet and a ball. This makes it a sport that developing countries can easily play. Some of the sport's best players come from these poor nations. 5. ____The sport's no-harids rule makes beautiful dance-like movements on the field. What's more, this sport excites the heart. Teams might score only a few times each match, so matches can turn around suddenly. No one knows who will win at the next World Cup. But one thing is certain: The world will be watching.
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