两部制定价中固定费的存在会将一部分潜在的用户排除在市场之外，因此损失一部分社会福利。
参考答案：对
When such an organised group became too large for its members to travel together comfortably, it would ______.
A．hurry up
B．split up
C．make up
D．pick up
对（）者，责令其立即清除，处以每立方米20元的罚款，不足1立方米的按1立方米计算。
A.乱扔烟头
B.乱丢瓜果皮核
C.乱倒垃圾
D.乱扔纸屑
