过早出现的漫天黄尘向人们敲响了警钟。专家就此提出：频率加快、间隔变短、强度增大，

发布时间：2017-04-19 11:50 │ 来源：www.tikuol.com

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问题：

过早出现的漫天黄尘向人们敲响了警钟。专家就此提出：频率加快、间隔变短、强度增大，将成为今后沙尘暴的新动向。下列叙述中正确的是

①与人为的高强度经济活动有关，如对沙漠边缘荒地的开垦 ②沙尘暴强度不断增大是土地沙漠化大面积扩展的标志 ③要抑制破坏该地区植被的各种活动 ④植树、种草、加大防护林的建设和加大西北地区的森林覆盖率，是防沙的最好途径 ⑤生物既能适应环境，又能影响环境[ ]

A．①

B．②③④

C．②③⑤

D．①②③④

考点：人口增长对生态环境的影响

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使用寿命有限的无形资产应自取得的次月起摊销。（）

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下列说法正确的是[ ]

A．HCHO溶液、(NH₄)₂SO₄溶液均能使蛋白质变性

B．煤的干馏是物理变化，煤的气化和液化是化学变化

C．纤维素、蛋白质、油脂、葡萄糖在一定条件下都能发生水解反应

D．聚碳酸酯中含有结构

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完形填空。

     A while ago, I didn't think I had a passion. I would sit in front of the TV all day and not think about anything
except the next   1  . At that time, I didn't know how   2 it was to have a passion in our life.
     The first   3   I thought about this was in the seventh grade when I went to school with my mom. As we
stopped at a red light, someone   4   my eyes. It was a man dressed in old   5   standing on the other side of
the   6  . This homeless man was not sitting down with a sad and hopeless   7 . He was standing,waving his
hands and dancing. He looked happy and held a radio as if it was the most   8 thing he had.
     Seeing all this   9   me. "Mom, why does that man have a radio even though he's homeless?" I asked.
    "He bought it," she replied. I was still   10 .
     "But if he's homeless, why doesn't he use his money to buy clothes? He  11  his money on something he
doesn't need. He should buy food."
    "Well, Sarah, sometimes food isn't the most important thing.  12  can be food for the  13 . Food and clothes
aren't the only things we need. People need happiness to stay  14 , too."
    I wasn't sure whether I  15  my mother's words. Maybe my mom was right. If one lives in sadness, there's
  16  to keep him moving from day to day.
     Now I  17  that I've had passions all along, but never recognized their importance in my life. They were
invisible (无形的) hopes that I  18  without knowing them. What's often forgotten is that we all need a  19 , a
light on a  20  day. We all need a passion.

( )1.A. display
( )2.A. efficient
( )3.A. moment
( )4.A. caught
( )5.A. cloths
( )6.A. way
( )7.A. expression
( )8.A. invaluable
( )9.A. shocked
( )10.A. puzzled
( )11.A. spent
( )12.A. Passion
( )13.A. soul
( )14.A. 1ive
( )15.A. understood
( )16.A. none
( )17.A. find out
( )18.A. depended
( )19.A. pleasure
( )20.A. darkness

B. show
B. effective
B. period
B. seized
B. clothes
B. passage
B. looks
B. expensive
B. astounded
B. wondered
B. wasted
B. Music
B. mind
B. living
B. agreed
B. nothing
B. know about
B. relied on
B. fun
B. dusk

C. exhibition
C. important
C. date
C. held
C. clothing
C. road
C. face
C. precious
C. astonishing
C. confused
C. took
C. Love
C. heart
C. alive
C. see
C. no one
C. come true
C. relied
C. joy
C. dim

D. show off
D. valuable
D. time
D. held on to
D. coat
D. express way
D. eyes
D. worthless
D. surprised
D. amazed
D. cost
D. Happiness
D. brain
D. lively
D. have gotten
D. anything
D. realize
D. lay in
D. enjoy
D. dark

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阅读下列材料，回答问题

材料一：

谬力为本业，耕织致粟帛多者复其身（免除徭役）。事末利（经商）及怠而贫者，举以为收孥（没收其妻子为官奴婢）。——《史记·商君列传》

材料二：

苏州“东北半城皆居机户，郡城之东皆习机业”。出现“大户张机为生”，以增殖财富；而工匠“趁织为活”，“得业则生，失业则死”的现象。

——《岳麓版必修二》

材料三：

顺治元年，清政府颁发“迁海令”，将北起山东南至广东的沿海居民内迁三四十华里，并且将所有沿海船只悉行烧毁，寸板不许下水。凡溪河装栅，货物不许越界，时刻瞭望，违者死无赦。――《台湾外纪》卷十二

请回答：

根据材料二说明在城市的经济领域又出现了什么新的现象？这种现象的实质是什么?导致这一新现象出现的根本原因是什么？

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