已知阴离子RX-,质量数为A,核外电子数为n,则m g该离子所含中子数为 ( )
A.(A-n+x)NA
B.
C.A-n-x
D.
答案:D
High boots were the______for women last year.
A.vulgar
B.vintage
C.vogue
D.vague
市话线路8米水泥杆普通土埋深()米,坚石埋深()米。