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【简答题】
某天然岩块质量为129.56g,在100°C-105°C烘干24h后,质量变为122.47g。然后对岩块进行蜡封,蜡封后试样的质量为131.21g,蜡封试件沉入水中的质量为80.36g。试计算该岩块的干密度是多少?水的密度取1.0g/cm3,蜡的密度取0.85g/cm3
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皮皮学刷刷变学霸
举一反三
【简答题】运动传导路是大脑皮质至躯体运动________的神经联系,分为________和________两部分。
【单选题】Geography is the study of the relationship between people and land. Geographers compare and contrast【C1】______places on the earth, but they also【C2】______beyond the individual places and consider the ...
A.
distant
B.
similar
C.
various
D.
famous
【单选题】Geography is the study of the relationship between people and the land. Geographers compare and contrast various places on the earth. But they also 【B1】 beyond the individual places and consider the e...
A.
pass
B.
reach
C.
go
D.
set
【单选题】Geography is the study of the relationship between people and the land. Geographers (地理学家) compare and contrast【C1】______ places on the earth. But they also【C2】______beyond the individual places and c...
A.
similar
B.
various
C.
distant
D.
famous
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