2. 专升本
  3. Good technique in medicine means less pain and fewer deaths and, ______ it is our duty to master it.

Good technique in medicine means less pain and fewer deaths and, ______ it is our duty to master it.

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问题 Good technique in medicine means less pain and fewer deaths and, ______ it is our duty to master it.
选项 A、altogether
B、therefore
C、otherwise
D、however
答案B
解析 therefore意为“因此”，however，otherwise表示转折意思。
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