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【多选题】
舱体密封材料使用的外部空间环境为：高真空( 1.3×10-4~10-7Pa) ，高、低温循环( -90~ +125℃)，每90 min 左右交变一次，太阳射线辐射，带电粒子辐射，微陨石和人造轨道碎片撞击以及原子氧侵蚀等。所以一般对性能要求很高，下列性能正确的是A.
耐真空
B.
耐辐照
C.
不易燃烧
D.
最好有香味，人闻着舒服
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】According to the author, the challenge on American students comes from______.
A.
the progression of globalization of economy
B.
the improvement of education in other countries
C.
the development of science and technology
D.
the flooding of foreign students
【简答题】阅读理解。 Jee Hock and Meng Kim were very good friends. Jee Hock could not see. He was blind. Meng Kim could not walk. He was lame. They lived in a village near a forest. Everyone in the village was going...
【单选题】实现经济发展目标，关键要在加快转变经济发展方式、完善社会主义市场经济体制方面取得重大进展．党的十七大报告提出，要促进国民经济又好又快发展．下列各项不属于促进国民经济又好又快发展措施的是()．
A.
提高自主创新能力，建设创新型国家
B.
加快转变经济发展方式，推动产业结构优化升级
C.
统筹城乡发展，推进社会主义新农村建设
D.
深化收入分配制度改革，增加城乡居民收入
【单选题】From the passage we can learn that ______.
A.
the teenage brain is a kind of work in progress
B.
the new brain scans support the conventional thought
C.
the brain's frontal cortex becomes bigger during the teenager years
D.
at the age of 11 or 12 teenagers are unable to find out people's true feelings
【简答题】阅读理解。 Jee Hock and Meng Kim were very good friends. Jee Hock could not see. He was blind. Meng Kim could not walk. He was lame. They lived in a village near a forest. Everyone in the village was going...
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