纵向弛豫是指（）。
A.T2弛豫
B.自旋-自旋弛豫
C.自旋-晶格弛豫
D.氢质子顺磁场方向排列
E.氢质子逆磁场方向排列
参考答案：C
单项选择。
There a meeting next week. [ ]
A. will have
B. is going to have
C. will to have
D. is going to be
