根据《公路工程技术标准》，公路分为五个等级，即（）、一级公路、二级公路、三级公路、四级公路。
参考答案：高速公路
两个三位数相加，它们的和是（ ）。
Which of the following is least accurate to describe the assumption of technical anajysis（）
A. Markets are efficient and rational.
B. Markets are influenced by irrational and rational investors.
C. Trends and patterns tend to repeat themselves and therefore predictable.
