In the service of knowledge, scientists also train the most skilled component of

游客2025-04-17 35

问题 In the service of knowledge, scientists also train the most skilled component of the work force ______ to the employers.

选项 A、in no cases
B、in a case
C、at no cost
D、at a cost

答案 C

解析依据句义有否定的意思；另外是“不惜任何代价”之意，不指“无论任何情况下”。

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