2. 外语
  3. They tried ______ respiration but it was of no avail.

They tried ______ respiration but it was of no avail.

admin2017-04-12  4
问题 They tried ______ respiration but it was of no avail.
选项 A、artificial
B、unnatural
C、false
D、unreal
答案A
解析 artificial a.人工的，人造的；假的，矫揉造作的。
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