佣金与杂费属于固定成本，有时也合称为买卖价差，一般按照交易金_爱下问搜题

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问题判断题

佣金与杂费属于固定成本，有时也合称为买卖价差，一般按照交易金额的固定比例收取。（）

答案

参考答案：错

解析：

佣金和杂费属于变动成本。

选择题

I'll never forget the day _____ the great scientist came to our school and gave us a speech.

A. that
B. which
C. when
D. where

单项选择题

In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.

A.MF/HF

B.SART

C.EPIRB

D.any of A, B, C