MRI信号通常是指（）.
A.90°脉冲序列信号
B.纵向恢复接收信号
C.自由感应衰减信号
D.共振吸收信号
E.射频信号
参考答案：C
_________ with such a failure, Arnold has no courage to live on the earth.
A．Facing
B．Faced
C．To face
D．Having faced
Ma Jiajue, a college student who killed four of his schoolmates, _______ in Sanya, Hainan Province
several days ago.[ ]
A. was caught
B. caught
C. is caught
D. was catching
