下列哪个不属于控制器的编码形式（）。A、形状编码和大小编码 B、位置编码和色彩编码

— Someone might see us.   

—  _____ ? We are not doing anything illegal.  [ ]

A. What's up

B. What if  

C. How came

D. So what

Courvoisier征

（）是施工项目成本决策与计划的依据。

A．施工成本分析

B．施工成本考核

C．施工成本计划

D．施工成本预测

简述PDH的缺点。

Directions :

Write an essay of 160-200 words based on the following drawing.

In your essay, you should

1) describe the pictures,

2) interpret the meaning, and

3) give your comment.

You should write neatly on ANSWER SHEET 2.