7.目前支护结构稳定的标准是位移

A.4~10mm/月                                                            B.10~15mm/月

C.15~20mm/月                                                          D.8~12mm/月

8.隧道中为保证停车视距，必须控制下列哪种物质的浓度

A.磷化物                                                                    B.CO

C.CO₂                                                                          D.烟雾

9.隧道照明效果，不仅取决于灯的亮度，也取决于背景空间的反射率，一般隧道墙面的反射率应大于

A.0.5                                                                            B.0.6

C.0.7                                                                            D.0.9

10.超短台架法分成上下两部分，上台阶仅超前下台阶

A.8~10m                                                                     B.10~15m

C.15~20m                                                                   D.3~5m

二、多项选择题(本大题共3小题，每小题4分，共12分)

在每小题列出的五个备选项中至少有两个是符合题目要求的，请将其选出并将“答题纸”的相应代码涂黑。错涂、多涂、少涂或未涂均无分。

11.支护受力量测包括

A.锚杆轴力                                                                B.喷层应力

C.接触压力                                                                D.锚杆应力

E.水压力

12.单向交通隧道通风风流纵向流动的代表形式有

A.喷流风压式                                          &nb