库仑土压力理论的基本假设有哪些？_爱下问搜题

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问题问答题简答题

库仑土压力理论的基本假设有哪些？

答案

参考答案：假定挡土墙是刚性的，墙后填土为无粘性土；滑动楔体是刚性的；滑动面是通过墙踵的二组平面，即墙背及土体内。

选择题

读甲、乙两图，完成1—2题。

1、有关两图的叙述正确的是[ ]

A．甲图的比例尺小于乙图

B．A、B两城市所在的自然带类型相同

C．铁路线均位于西部平原

D．B、C两城市间的距离超过100千米

2、已知D区域的年平均降水量在2000毫米以上，其形成原因有

①常年受赤道低气压带控制，多对流雨②盛行东北季风，风从海洋吹向陆地

③地处山地迎风坡，容易形成地形雨④沿岸有暖流经过，起到增温增湿作用[ ]

A．①②

B．①②③

C．③④

D．②③④

完形填空

         It was a bitter, cold evening in northern Virginia many years ago. The old man was waiting for a ride across the  36 . The wait seemed  37 .
At last he heard the slight, steady rhythm of approaching hooves (马蹄) coming along the frozen path. Anxiously, he   38   as several horsemen came around the bend (转角处). He let the first one   39 . Then another, and another. Finally, as the   40   rider neared the spot where the old man sat like a snow statue, the old man   41   the rider’s eye and said, “Sir, would you mind giving an old man a ride to the other side? There doesn’t appear to be a passage way by 42 .”
The rider replied, “Sure.” Seeing the old man was unable to 43  his half-frozen body from the ground, the horseman got down and helped the old man onto the horse. The horseman took the old man not just across the river, but to his destination.
As they neared the tiny but cozy (舒适的) cottage, the horseman’s   44   caused him to ask, “Sir, I notice that you let several other riders go by without making a(n)   45   to get a ride. Then I came up and you   46   asked me for a ride. I’m curious why, on such a bitter winter night, you would wait and ask the last rider.   47  I had refused and left you there?”
The old man replied, “I’ve been   48   here for some time. I think I know people pretty good.” He continued, “I looked into the eyes of the other riders and immediately saw there was no  49   for my situation. But when I looked into your eyes,   50   was evident. I knew,   51 , that your gentle spirit would   52   the opportunity to give me help in my time of   53 .”
Those heartwarming comments   54   the horseman deeply.
“I’m most grateful for what you have said,” he told the old man. “May I never get too busy in my own affairs that I  55   to respond to the needs of others with kindness and compassion.”
With that, Thomas Jefferson turned his horse around and made his way back to the White House.

A．meaningless

A．immediately

C．seriousness

A．then and there	B．for a moment
C．all of a sudden	D．sooner or later