“自天子以至庶人，壹是皆以修身为本”出自以下哪本书（）。
A. 《道德经》
B. 《大学》
C. 《易经》
D. 《论语》
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“圣人无常心，以百姓心为心”语出（)。
A. 《菜根谭》
B. 《论语》
C. 《老子》
D. 《庄子》
___is an agreement whereby the seller provides goods or services to the buyer without asking the latter for immediate cash payment.
A. trade credit
B. bank loans
C. commercial paper
D. factoring accounts receivable
– – Take it easy.He‘ll do well.（)
A. I just can‘t help worrying about my brother.
B. What‘s the matter with your brother？.
C. How about your brother？
D. My brother will succeed, I believe.
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