烧结“终点”提前，负压（）
A、上升
B、降低
C、不变
D、无关
参考答案：B
The picture shows what Liu Fei does on Sundays. He spends 9.6 hours sleeping and ______ hours
doing sports a day.
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A. 3
B. 6
C. 7
碳酸盐岩的沉积环境与蒸发岩的的沉积环境相排斥，而与陆源碎屑的沉积环境关系密切。（）
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