在技术方案的经济效果分析中,盈亏平衡分析的固定成本有()。
A.固定资产折旧费
B.无形资产摊销费
C.计时工资
D.计件工资
E.原材料费用
参考答案:A, B, C
Don't talk about such a thing in the________of young children.[ ]
A. appearance
B. surface
C. existence
D. presence
You didn’t have breakfast. You ________ be hungry now.
A.must
B.can’t
C.could
D.might