当自然接地体的接地电阻达不到要求时应如何处理？
参考答案：当自然接地体的接地电阻应增加人工接地体。
面部丰满度受哪几个因素影响（）。
A.垂直距离
B.前牙唇舌向位置
C.唇侧基托厚度
D.B与C
E.A与B与C
What did I do in Washington().
A.I worked in a drugstore.
B.I worked in a copy room.
C.I did research about my family.
D.I worked in a library.
