9．若回旋线参数为A＝400，则距回旋线起点400m处的曲率半径为______m。

A．200                                                            B．300

C.400                                                               D．600

10．下列互通式立交属全互通式立交的有

A．喇叭形                                                       B．菱形

C.部分苜蓿叶                                                  D．部分定向式

11．下列竖曲线是凹形竖曲线的是

A．i1＝3％，i2＝4％                                        B．i1＝4％，i2＝3％

C．i1＝3％，i2＝2％                                        D．i1＝－2％，i2＝－3％

12．下列损坏不属于沥青路面的损坏的是

A．车辙                                                          B．反射裂缝

C.低温开裂                                                      D．传力杆失效

13．我国高速公路测设中的缓和曲线按传统选用

A．三次抛物线                                                B．双纽线

C.回旋线                                                         D．正弦曲线

14．某山岭区二级公路，变坡点桩号为K5＋030.00，i1＝5％，i2＝－3％，竖曲线长为160m，则竖曲线半径为______m。

A．2000                                                          B．2400

C.3200                                                             D．4000

15．隔离设施安装高度一般为______左右。

A．1.40～1.60m                                               B．1.50～1.70m

C.1.60～1.80m                                                 D．1.70～1.90m

16．设中央分隔带宽度为3m，右路缘带宽度为0.75m，则中间带的宽度为______m。

A．3.75                                                           B．4.5

C.2.25                                                              D．6.75

17．在高速公路平面定线中，______往往是首选的要素。

A．直线                                                          B．大半径圆曲线

C．缓和曲线                                                   D．小半径圆曲线

18．下列指标用于评价路面结构状况的是

A．IRI                                                             B．PCI

C.SRV                                                              D．SFC