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【单选题】
就社会科学的决策类科学而言，对“理论来源于实践”的正确理解是()。A.
问题来源于实践
B.
答案来源于实践
C.
推理过程来源于实践
D.
解答方法来源于实践
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反馈参考答案：
举一反三
【单选题】-Could I bother you for a moment?I need someone to copy this file for me. - .I need to do some copies too and I can copy them together. [ ]
A.
Sorry,but I can’t
B.
You are welcome
C.
That’s no trouble at all
D.
Don’t say so
【判断题】Varied factors can influence wo rkplace efficiency. These include exterior factors and interior factors .
A.
正确
B.
错误
【单选题】I ______ the book. I may well borrow one from the library.
A.
need to have bought
B.
need have bought
C.
needed not bought
D.
needn't have bought
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