荀子在其著作《君道》篇中说：“君者，民之原也；原清则流清，原浊则流浊。”请简述这句话的意思。
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Cold weather starting of a diesel engine is more difficult than warm weather starting due to（）
A. use of low viscosity oil in cold weather
B. increased moisture content of inlet air in cold weather
C. increased drag of pistons and bearings due to increased oil viscosity
D. higher compression pressures reached due to smaller clearances existing in the engine during cold weather
Which two are valid and equivalent？（）
C. int i；
D. int i；
E. int i；
软件需求工程师的职责不包括以下的哪一项（）。
A. 撰写需求规格说明书
B. 与用户持续沟通，了解用户对产品的期望
C. 控制项目的风险
D. 对需求的优先级进行排序
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