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【单选题】
在实验室里，应保存在煤油中的药品是A.
氢氧化钠
B.
金属钠
C.
氧化钠
D.
过氧化钠
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皮皮学刷刷变学霸
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【单选题】If the cumulative curve of soil particle size distribution is very steep, it means ().
A.
Soil particles are uniform.
B.
The non-uniformity coefficient is large.
C.
Good gradation
D.
Filling is easy to tamp.