填充料可以增大辅助阳极与土壤的接触面积,减少()。
A.阳极接地电阻
B.阳极地床面积
C.阳极地床体积
D.阳极根数
参考答案:A
They often________their friends at weekends and they always have a good time.[ ]
A. envy
B. interest
C. entertain
D. encourage
乳牙出齐的年龄是()
A.1岁
B.1岁半
C.2岁
D.2岁半
E.3岁