在测量接地电阻时,为保证测量准确,被测接地极,辅助接地极及指针之间的距离应大于()m。
A、30
B、20
C、15
参考答案:B
属于足厥阴肝经循行的部位有()。
A.阴器
B.少腹
C.两胁
D.两乳
E.巅顶
The school is giving most of these children hope for the future by providing them with a chance to
_______ knowledge.[ ]
A. require
B. acquire
C. achieve
D. discover