自然接地体应在不同的两点及以上与()相连接。
参考答案:接地干线或接地网
某种铱原子的相对原子质量是192,其核电荷数为77,则这种铱原子的核外电子数是 [ ]
A.38
B.77
C.115
D.192
Could you give me ___________ time to think about it?
A.any more
B.no more
C.some more
D.many more