问题 综合

黄土高原是世界上最大的黄土堆积区,它东起太行山,西至乌鞘岭,南连秦岭,北抵长城。读下图,回答下列问题。(8分)

(1)写出图中数字表示的地理事物名称:

山脉:①___________、③_____________;河流:④____________。

(2)黄土高原的地表特征是_______________________________________________。

(3)造成黄土高原水土流失的原因,从降水来看______________,此外还有_____________等自然原因。

(4)治理黄土高原水土流失的主要生物措施是_______________________________。

答案

(1)太行山   秦岭   黄河    

(2)千沟万壑、支离破碎

(3)夏季多暴雨      土质疏松    

(4)植树种草

题目分析:

(1)读图可知,黄土高原位于长城以南,③秦岭以北,祁连山乌鞘岭以东,①太行山以西,是世界上黄土分布面积最广的区域。

(2)由于土质疏松,植被稀少,在夏季暴雨的冲刷下,水土流失严重,形成了黄土高原千沟万壑、支离破碎的地表形态。

(3)严重的水土流失带来的后果水土流失可使大量肥沃的表层土壤丧失,造成土壤肥力下降,耕地面积大为减少,同时大量泥沙注入黄河,淤塞河道,给下游地区的防洪带来严峻的考验,历史上黄河下游曾多次决口泛滥,给华北地区的人民带来了深重灾难,黄土高原生态环境脆弱。

(4)治理的措施是:植树造林,修建梯田,退耕还林还牧、修挡土坝等。

解答题
完形填空
完形填空。
     On a cold winter day, I waited in line to see my hero,Jack Canfield, the author of The
Success Principles.
     During his talk, Jack__1__his wallet, pulled out ahundred-dollar bill, and said, "Who
wants this?"__2__shot up in the audience; people leaned forward to see whomJack
would__3__. But Ijumped up, ran up the __4__tothe stage, and grabbed the bill. As I
was launching myself inthe air, thoughts__5__through my mind - was I about tobe
humiliated(羞辱)in front of 800 people? Would they__6__security guards and take me
f rom the stage?__7__my desire(欲望,要求)for brave action was louder than any__8__voice.
     As I got the bill from his hand,he said, "That's it ! Wecan't wait for the__9__to come to
us. We must take action to__10__what we want!" 
     After his talk, 1 managed to formally meet Jack and bravely asked for his__11__email
address. Over the next months, I sent him emails__12__my vision and dreamswith him. He
kindly emailed back lots of encouragement. But my life got__13__with other things. I stopped
e-mailingJack.
     A year later, my dreams had worn away. I thought Jackwould inspire me into action, like
a gian__14__that would show me the way.
     I emailed him, and then again---but got no__15__. As I sat down at my computer to
check my emails, I_16__woke up. What was I doing? I was waiting! Now I remembered
the crowd, most likely__17__that hundred- dollar biil, while they sat__18__ to their chairs.
Usually we all have a "Jack" for whom we wait-whether it's a person, a place or a thing.
We __19__believe the gifts of life are just around the corner, and thateverything will come
in a(n)__20__way. So we don't try. We give up. But as Wayne cretzky said: "You'll always
miss 100% of the opportunities you don't take!" So I stopped waiting and started my writing
career.Now what are you waiting for?
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