拦污栅一般常用断面形状有四种：迎水面和背水面加工圆形、迎水面加工圆形、矩形、（）。
A、正方形
B、梯形
C、椭圆形
D、圆形
参考答案：D
当你来到一个荒岛到上没有任何可以使用的东西而你自己带有10只鸡和2公斤玉米而且时间不允许将玉米播种，问：为了尽可能使自己存活长的时间，你将如何去做？（）
A.先吃玉米后吃鸡
B.先吃鸡后吃玉米
C.用玉米喂鸡然后吃鸡
Most of the differences among companies with respect to quality of earnings are addressed when companies are compared using:
A. price to cash flow ratios but not price to earnings ratios.B. price to earnings ratios but not price to cash flow ratios.C. either price to cash flow ratios or price to earnings ratios.
