下列()土壤保肥能力最强
A.高岭石
B.伊利石
C.蒙脱石
D.腐殖质
参考答案:D
— ______
—E-R-A-S-E-R , eraser. [ ]
A. Can you spell it?
B. What's this?
C. Spell it, please.
D. Do you spell it?
尿干化学法检测的白细胞主要是
A.嗜中性粒细胞
B.嗜碱性粒细胞
C.嗜酸性粒细胞
D.淋巴细胞
E.单核细胞