Thanks ___________ your help.[ ]
A. at
B. to
C. for
答案：C
Tony often does his homework ______, so he often makes many mistakes. [ ]
A. well
B. carefully
C. carelessly
D. easily
下列哪个是MR临床上最常用的序列（）
A.自旋回波序列（SE.
B.反转恢复序列（IR）
C.快速自旋回波序列（TSE.
D.梯度回波序列（GRE.
E.平面回波序列（EPI）
