题干

造成黄河下游地上河的原因是(  )

A:黄河上游气候趋于干旱

B:河套平原大量引水灌溉

C:黄土高原水土流失严重

D:内蒙古高原严重沙漠化

上一题 下一题 0.0难度 选择题 更新时间:2018-09-18 10:16:29

答案(点此获取答案解析)

C

同类题3

阅读填空 先通读下面的短文,然后根据短文内容,在文章后表格的空格内填入一个最恰当的单词。所填单词必须写在答题卡对应题号的横线上。每个空格只能填一个单词。

    A study shows that one million lives might be saved each year if people wash their hands with soap(肥皂) often. It also says that hand-washing with soap could be among the best ways to reduce diseases. Doctors say many diseases can be prevented from spreading by hand-washing. These include the common cold, influenza(流行感冒), hepatitis(肝炎), infectious diarrhea(腹泻) and so on.

    Doctors say you are easy to catch a cold by touching your nose or eyes after someone nearby has sneezed or coughed. Another reason to catch a disease is to eat food prepared by someone whose hands were not clean.

    They also say that hand-washing is especially important before and after preparing food, before eating and after using the toilet, after touching money and sneezing or coughing. The most helpful way is to wash them together while using soap and warm water. You do not have to use special soap. Be sure to wash all areas of the hands for about ten to fifteen seconds.

Title : Basic Knowledge of hand-washing

Diseases are

under ____.

People can____ many diseases from spreading by hand-washing such as the common cold, influenza and so on.

The____ of

becoming sick.

●Touch your nose or eyes after someone nearby has sneezed or coughed.

●Eat food prepared by____ hands.

____to do hand-washing.

●Before and after preparing food.

●Before eating and after using the toilet.

●After touching money and sneezing or coughing.

How to do

hand-washing.

●Wash them together while using soap and warm water.

●Wash all areas of the hands for about 10-15 seconds.

同类题5

阅读下面的文章,回答小题

两颗金银花

    ①朋友两前送给我的那棵栽在院子一角的金银花,四月份就迫不及待地开放了,千万朵金银花你不让我,我不让你,在微风细雨中轻轻地摇曳着。有的含苞欲放,羞答答的细小的白色花蕾散发出若有若无的淡淡香味;有的正在盛开,一簇簇的小花在它们洁白的椭圆形细碎花瓣中伸出小小的心蕊,悠悠的清香,白黄两种颜色既不失单调,又高雅清洁,小雨滴沾在上面,为金银花增添几分姿色,就像邻家的小女孩活泼可爱;有一些花朵开的时间长了,白色的花朵已经变成金黄色,就像姑娘头上戴着的黄色发髻,一枝数朵,给人一种惊喜,一缕清爽,实在是标致极了。这些开放着的花朵在雨中默默地散发着它们特有的香气,把芳香送给从这里经过的每一个人,微风吹来,花枝花朵摇摆起伏,袭人香气简直可迷醉万人。想不到两的时间,这棵金银花就由纤弱的一棵小苗长成了亭亭玉立的美少女,主干已经有两米来高了,足有大拇指那么粗,在主干上还发出了一些枝桠,这些枝桠柔柔的、嫩嫩的,伸着毛绒绒的头,吐出一丝绿意,左摆右摆地在风中摇着摇着就攀附在了桃树上,一个劲地噌噌直往上长,密密麻麻的卵形的绿叶非常茂盛,以白色的围墙做背景,配合着粉红色的桃花,桃树下一盆盆茉莉、竹子、山茶、文竹、玫瑰、水仙,姹紫嫣红,绿叶红花,色彩鲜丽,显得格外的娇艳动人,特别逗人喜爱,是入画的一景。

    ②看着金银花长得那么盛,花开得那么多,我心里有些后悔。其实朋友把金银花送给我之后,我就把只它栽在院子的一角,想起的话,就给它浇点水,有时连水都忘了浇,更不用说施肥了。超强的生命也让金银花显得不起眼,平凡的花,平凡的花香,甚至常被人忽略,就好象人们总是想得到天山雪莲的高洁,却忘记了山脚下狗尾巴草的万般风情。

    ③钟情于金银花的叶子绿,花儿的美,那淡淡的香味儿,去我在花盆又扦插了一棵金银花,准备长大后放在客厅里。我希望这棵金银花能够带给我一片葱茏的绿色,淡淡的花香。曾经,我为我的这个设计充满了赏心悦目的憧憬和希冀。为此,我选用了树林里的基土,埋入了最好的基肥,随时不忘给它浇水,精心呵护,一如母亲精心照料刚出生的婴儿。甚至冬天还把他从院子里搬到房子里,白天又从房子里搬到院子里,让它充分享受阳光,乐此不疲。但很遗憾,一来,它只是窝在花盆里,不长高,也不长粗,它所报答于我的便只是若干枝条和绿叶,看来连花都不会开。

    ④然而,我对它却没有丝毫的抱怨,因为我就知道:它已经尽力了。就是说,它所能够报答于我的,也就是这些了。是的,它有着充足得过分的肥料供应,充足得过分的水的供应,充足得过分的主人的关怀……但没有足够的风,没有足够的地气,更是没有足够的成长的自由,没有足够让根自由伸张的空间!而那些自由,作为主人的我,竟然在很长的时间里茫然无知——居然不知道它还要自由!

    ⑤两棵金银花,一棵在院子里无拘无束自由生长,越长越高,绿树成荫,盘虬卧龙,花香四溢;一棵长在花盆里,虽然受到精心呵护,却似一棵长不高长不大的小草。我们应该知道:有自由的空间,有些小草其实是可以长成一棵树的!

(选自《新华副刊》,略有改动)