问题
选择题
Good technique in medicine means less pain and fewer deaths. ________ it is our duty to master it.[ ]
A．Altogether
B．Therefore
C．Otherwise
D．However
答案
答案：B
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Good technique in medicine means less pain and fewer deaths. ________ it is our duty to master it.[ ]
A．Altogether
B．Therefore
C．Otherwise
D．However
答案：B