调节阀的旁通阀通常选用（）。
A、闸阀
B、截止阀
C、止逆阀
D、安全阀
参考答案：B
下列选项中不能作为法律关系客体的是( )。
A．荣誉称号
B．经济管理行为
C．非营利组织
D．商品
Directions:
Write an essay of around 200 words entitled "On Being Thrift" based on the following picture. You should interpret the picture and discuss whether being thrift should be advocated in our pursuit of happiness.
