建立小地区高程控制网的主要方法是三角高程测量和一、二等水准测

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问题判断题

建立小地区高程控制网的主要方法是三角高程测量和一、二等水准测量。

答案

参考答案：错

选择题

看图，选词填空。

1. Look at my hair. It's _____________ and black. [ ]

A. short

B. long

C. young

2. This is my grandfather. He has _____________ hair. [ ]

A. black

B. green

C. white

3. This is my friend. She has _____________ and _____________ hair. [ ]

A. long; curly

B. long; straight

C. short; curly

判断题

我国标准轨距线路允许误差为+6mm、-2mm。