A.松散; B.密實(shí); C.稍密; D.中密;
A.Q3及以前; B.Q4及以前; C.100年以前; D.在50-100年之內(nèi)視壓密情況而定;
A.有機(jī)質(zhì)土、泥炭; B.有機(jī)質(zhì)土、泥炭質(zhì)土、泥炭; C.無(wú)機(jī)土、有機(jī)質(zhì)土、泥炭質(zhì)土、泥炭; D.有機(jī)質(zhì)土、無(wú)機(jī)質(zhì)土;