题目内容

Question 4

A collection of bird fossils from Australia.
B. Photographs of certain rare fossil exhibits.
C. Some ancient wall paintings from Australia.
D. Pictures by winners of a wildlife photo contest.

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What is the core of maker culture?It is 1i_ or 2c.

通过观察以下曲线要素，可判定线路中线为右偏曲线的是：

A. R=1000m
B. α_Y=15°21′09″
C. lo=90m
D. T=97.032

线路中线交点里程为K24+300.653,切线长为143.265m，缓和曲线长60m，则直缓点里程为：

线路中线直缓里程为K54+267.553，缓和曲线长80m，则缓圆点里程为：