搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列不是影响和控制土壤溶液组分和浓度的因素和过程的是（）

a、土壤溶液与地下水之间物质淋溶与毛细管上升过程

b、土壤液相与大气层之间的气体溶解与失散过程

c、土壤溶液与土壤生物之间的选择吸收、被动吸收与代谢过程

d、土壤溶液与胶体之间的离子吸收与解析过程

答案

参考答案：D

单项选择题

What would be the impact on a firm’ s return on assets ratio (ROA) of the following independent transactions, assuming ROA is less than one Transaction 1: A firm owned investment securities that were classified as available-for-sale and there was a recent decrease in the fair value of these securities. Transaction 2: A firm owned investment securities that were classified as available-for-trading and there was recent increase in the fair value of the securities. Transaction 1 Transaction 2（）① Higher Lower ② Higher Higher ③ Lower Higher

A. ①

B. ②

C. ③
查看答案
名词解释

合力投影定理
查看答案