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
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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
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Thomas Edison 1 the first job.For the next five years he went around the count  ry 2 job.At last Edison went to New York.He had 3 money.He could not buy enough food to eat.He has no place to sleep .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  w ones.The head man liked Edison's new machines.He was going to give 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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