考博考试

【单选题】 In the service of knowledge, scientists also train the most skilled component of the work force ______ to the employers.
A．in no cases
B．in a case
C．at no cost
D．at a cost

网考网参考答案：C
网考网解析：
[注释]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”。 查看试题解析出处>>