根据《民用建筑节能条例》，在正常使用条件下，保温工程的最低保修期限为（）年。
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桥梁按结构体系和受力特性的不同，可分为上承式桥、下承式桥和中承式桥。()
There is a simultaneous trial taking place in the next build.
A. fair
B. full
C. coexisting
D. public
根据《地图管理条例》，互联网地图服务单位对在工作中获取的涉及国家秘密、商业秘密的信息，应当保密。()
The second paragraph mainly discusses__________. 查看材料
A. a report about Washoe"s progress in learning sign language.
B. the whole direction of primate research.
C. new primate researches conducted by many language scientists.
D. an experiment with Washoe at a research center in Africa.
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