T2WI主要反映组织的差别()
A.氢质子密度
B.横向弛豫
C.纵向弛豫
D.合磁矢量
E.静磁矢量
参考答案:B
The boy is only five years old,but he is quite used _____ the telephone.
A.to answer
B.to answering
C.of answering
D.by answering
自然循环锅炉汽包最高水位的标准?