规划评估是指咨询机构接受委托,对区域或行业提出的规划进行分析论证,提出建议,为( )提供咨询服务。
A.投资方 B.委托人 C.当事人 D.决策者
参考答案:D
有机硫化合物对烷基汞测定的干扰主要是对色谱柱的影响。有机硫化合物不能从色谱柱中流出,积存在柱内,使色谱柱分离效率下降。
Which of the following most accurately describes the typical relationship between marginal product (MP) and average product (AP) As the quantity of labor increases:()
A. initially, AP < MP, then AP = MP, then AP > MP.
B. initially, AP = MP, then AP > MP.
C. AP is always less than MP.