影响原尿生成因素()
A.肾小球滤过膜面积
B.肾小球滤过膜通透性
C.有效滤过
D.肾小管再吸收量
E.以上均不正确
参考答案:A, B, C
Wind power is an ancient source of energy ______________we may return in the near future. [ ]
A. on which
B. by which
C. to which
D. from which
直埋敷设于非冻土地区时,电缆埋置深度应符合( )规定。
A.电缆外皮至地下构筑物基础,不得小于0.5mB.电缆外皮至地下构筑物基础,不得小于0.3mC.电缆外皮至地面深度,不得小于0.7mD.当位于车行道或耕地下时,应适当加深,且不宜小于1m