下 * * 脏配合关系中,被称为“水火既济”的是()
A.心肾
B.心肝
C.心脾
D.肺肾
E.脾肾
参考答案:A
— How do you know so much about what’s going on in the countryside?
— I’ve got a friend there who keeps me ________.
A.informing
B.to be informed
C.informed
D.being informed
出铁过程中下插电极的作用是什么?