單項(xiàng)選擇題

前四類土由軟到硬的排列順序?yàn)椋ǎ?/h4>

A.松軟土、普通土、堅(jiān)土、砂礫堅(jiān)土
B.普通土、松軟土、堅(jiān)土、砂礫堅(jiān)土
C.松軟土、普通土、砂礫堅(jiān)土、堅(jiān)土
D.堅(jiān)土、砂礫堅(jiān)土、松軟土、普通土

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