问题
单项选择题
对于直面为碎裂结构的硬岩或层状结构的不连续地层,以及坡面岩石与基岩分离并有可能下滑的挖方边坡,其护坡形式宜选用( )。
A.干砌片石
B.喷射混凝土护坡
C.浆砌片石
D.浆砌预制块
答案
参考答案:B
对于直面为碎裂结构的硬岩或层状结构的不连续地层,以及坡面岩石与基岩分离并有可能下滑的挖方边坡,其护坡形式宜选用( )。
A.干砌片石
B.喷射混凝土护坡
C.浆砌片石
D.浆砌预制块
参考答案:B
完形填空。 | ||||
Thomas Edison 1 the first job.For the next five years he went around the count ![]() For many days Edison 4 work.He was hungry.At last he found work fixing machines.He could mend the old machines.He also 5 ne ![]() Edison $40,000 for them.Edison would now have money to do 6 he wanted. Thomas Edison was then 23.He used the money to build a shop in New Jersey.He had many people 7 him.But he worked more than 8 of them.He rested very little.Soon he was making more than 40 new things 9 . In 1876 Alexander Graham Bell made a telephone.But it could carry voices only a little way.Edison wanted to make 10 telephone.He soon made one.It could carry voices a long way.
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