以下关于产品单位成本分析中，各主要项目分析的公式正确的有（）。
A．材料消耗量变动的影响=(实际数量一计划数量)×计划价格
B．材料价格变动的影响=实际数量×(实际价格一计划价格)
C．单位产品所耗工时变动的影响=(实际工时一计划工时)X计划每小时工资成本
D．每小时工资成本变动的影响=实际工时×(实际每小时工资成本一计划每小时工资成本)
参考答案：A, B, C, D
| 阅读理解：你想知道中西方的节日有何不同吗?快来看看这两封电子邮件吧! | ||
Today is the Mid-Autumn Festival. We will watch the moon tonight, and look for Change and Wu Gang. We usually eat mooncakes. They are round, like the moon. National Day is also in autumn, on October 1st. My mother and father are usually free for seven days! We will do many things together. I like going to the National Day celebration. But the best thing in autumn is my birthday. It's in October. I will be fifteen years old. Goodbye. Yours, Li Ming
Thank you for your e-mail! I love autumn too. In Canada, we have an autumn holiday called Thanksgiving Day. Family members always celebrate it together. I will go to my grandmother and grandfather's house. My uncles, aunts and their children will be there too. Canadian Thanksgiving Day is in early October. In the USA, they celebrate Thanksgiving Day in late November. Have a good time on your birthday, Li Ming! On my birthday, I have a cake with candles. Everyone sings the song "Happy birthday". Then I blow out the candles! Will you have a cake for your birthday? Your friend, Jenny | ||
| 1. When is Li Ming's birthday? | ||
| A. On September 29th B. In September C. Before September 29th D. After September 29th | ||
| 2. Americans celebrate Thanksgiving Day __________. | ||
| A. in early October B. in early November C. in late October D. in late November | ||
| 3. —What do Canadians usually do on Thanksgiving Day? —They usually __________. | ||
| A. eat cakes B. stay together C. watch the moon D. sing a song | ||
| 4. The subject (主题)of Jenny's e-mail is "__________". | ||
| A. Your birthday B. My birthday C. Thanksgiving Day D. National Day |