某公路山岭隧道,里程为K5+100~K8+100,长度为3000m;进口段K5+100~K5+400为Ⅳ级围岩,覆盖层厚度为38m;K5+400~K8+100为Ⅴ级围岩,覆盖层厚度为60~250m,其中K6+800~K7+300为曲线;采用双向钻爆导坑法施工,用8个月实现隧道贯通。 根据此案例场景,回答下列问题: 用中线法进行洞内测量时,中线点的布置不宜少于( )点。
A. 125+1
B. 60+1
C. 35+1
D. 30+1
查看答案
资本市场允许银行在流动性短缺时,及时融入昕需资金,而在出现流动性过剩时,又可以及时将资金运用出去,提高营利性。 ( )
A. 对
B. 错
We may conclude from reading the passage that ()
A. a hovercraft can not fly high because of the surrounding high-pressure air
B. a hovercraft is as much in use as a plane
C. a hovercraft "flies" with a greater speed than ships
D. a hovercraft also has the problem of wave resistance
某公路山岭隧道,长度为2000m;穿越的岩层主要是坚硬岩,岩体较完整,块状或厚层状结构;采用新奥法钻爆施工。两洞口处由于岩层较破碎设有明洞,进口明洞长10m,出口明洞长8m;两洞门采用端墙式洞门。 根据此案例场景,回答下列问题: 该隧道的围岩分级主要是( )。
A. Ⅱ
B. Ⅲ
C. Ⅳ
D. Ⅴ
Bush fires travel ()
A. in small way
B. in disorder
C. seriously
D. swiftly