在纵向驰豫中,纵向磁矩恢复到原来的所需的时间为一个单位T1时间()
A.100%
B.75%
C.63%
D.50%
E.37%
参考答案:C
The film star and her film _____ you have just talked about are well known to everyone. [ ]
A. that
B. which
C. who
D. whom
看下图回答下列问题:
两图表明商品生产和商品交换受什么规律支配?简述这一规律的基本内容和表现形式。