问题 问答题 简答题

洪积扇(洪积土)的工程地址特征?

答案

参考答案:

山洪夹带大量的泥砂石块流出沟谷口后,由于沟床纵坡变缓,地形开阔,水流分散,流速降低,搬运能力骤然减小,所夹带物质在沟口一带形成扇展布的堆积体,称为洪积扇。规模很大的洪积扇一般可划分为三个工程地质条伯件不同的地段;靠近沟口的粗碎屑沉积地段(I),孔隙大,透水性强,地下水埋藏深,承载力较高,是良好的天然地基;洪积层外围的细碎屑沉积地段(III),如果在沉积过程中受到周期性的干燥,粘土颗粒发生凝聚并析出可溶盐时,则洪积层的结构较牢固,承载力也比较高;上述两地段之间的过度带(II),由于经常有地下水溢出,水文地质条件不良,对工程建筑不利

阅读理解

I moved from Chicago to Brooklyn in July of 2010,just in time to watch my mother die. Our parents were both gone now; I took with me as many things they had left behind as I could.

I was out walking one Saturday later that summer when something caught my eye - a pale green dress. Laid out on the pavement was stuff like earrings, glass candle-holders, books. Hanging on the fence behind were a few pairs of jeans and a green cotton dress.

The woman, the host o£ the stoop (门廊)sale, looked like she was getting rid of a past she didn’t need or want. A dress that was too big for her. A chest of drawers that took up too much space, space she needed, maybe, to heal ,recover, or grow.

I wasn’t planning on buying anything really, but now I needed to show her that I appreciated her things and I would give them a safe home. Then I had my first stoop sale —I paid her 20 dollars for her green cotton dress and her blue candle-holder,

From that day on, I became interested in stoop sales. Some of my favorite things are from someone else’s life. I find no joy in shopping at regular stores any more. I love trying to sniff out a memory from a bud vase or a drawer. It is comforting to know that someone has breathed and laughed inside a sweater before me.

A few weeks ago, I carried my mother’s dresses to a friend’s stoop. These were her best items ,which were once worn by the most important person in my life. For many hours, I watched from across the path people advancing the stoop, some leaving with Mom1S dress. I used to think that her stuff was as forever sacred (神圣的)as my memory of her, I know now that once I love a scarf or shirt too dearly,it needs to find a new home. Even that green dress is long gone by now.

小题1:The author took her mother*s dresses after her death because ______

A.she valued the things used by her mom

B.she didn’t want to throw them, away

C. she could sell them later

D. they were her mom’s best items小题2:From the passage, we know that ______.

A. the things the author bought from the woman are too big

B. the author is fond of imagining others’ life experiences

C. the author will never shop at regular stores any more

D. the author still keeps most of her mom’s things小题3:In the last paragraph ,the author tries to tell us that ______.

A her mom is the number one person in her life

B.  she didn’t really want to sell her mom’s dresses

C. she still thinks of her mother quite often

D. love doesn’t mean holding on to something tightly

小题4:It can be inferred that the author will ______.

A. not sell her own things at stoop sales

B.keep her mom in her mind in another way

C. be sad about all the memory of her mom

D. move to another city for a new life

单项选择题