病理性肾结核主要位于肾脏的
A.肾皮质B.肾髓质C.肾 * * D.肾盏E.肾盂
参考答案:A
Paul had to write a history paper, _____ he couldn’t find time to do it.
A.but
B.so
C.because
D.if
某地块土壤容重1.2g/cm3,土壤密度2.6g/cm3,土壤田间持水量25%,求土壤固液气三相比?