下列叙述错误的是[ ] A．地面环境复杂，生活在陆地上的动物都具有与环境相适应的

发布时间：2017-04-22 10:56 │ 来源：www.tikuol.com

题型：选择题

问题：

下列叙述错误的是[ ]

A．地面环境复杂，生活在陆地上的动物都具有与环境相适应的形态结构

B．肺是适应地面生活的呼吸器官

C．家兔的盲肠粗大，与消化植物性食物无关

D．家兔的心脏具四腔，有利于维持体温的恒定

考点：生物及其特征

题型：选择题

任务型完形填空：用方框中所给单词的适当形式填空，每个单词限用一次，使短文通顺正确连贯，将答案填写在题后的横线上。

easily, pass, job, spend, will, expensive, other, marry, interest, city

                                                             Young People in Britain
    Life used to be fun for "teenagers". They used to have money to spend, and free time to while away (消磨).
They used to wear teenage clothes, and meet in teenage coffee bars and discos. Some of them still do. But for
many young people, life is harder now. 1.           are difficult to find. There's not so much money around.
Things are 2.            , and it's hard to find a place to live in. Teachers say that students work harder than they
used to. They are less 3.            in politics, and more interested in 4.            exams. They know that good
exam results may bring them better jobs.
    Most young people worry more about money than their parents did twenty years ago. They try 5.
less and save more. They want to be able to get homes of their own one day.
    For some, the answer to unemployment (失业) is to leave home and look for jobs in one of Britain's big
6.            . Every day hundreds of young people arrive in London from other parts of Britain, looking for jobs.
Some find jobs and stay. 7.            don't, and go home again, or join the unemployed (失业者) in London.
    When you read the newspapers and watch the news on television, it's 8.            to get the idea that British
young people are all unemployed, angry and in trouble. But that's not true. Three quarters of them do more or
less what their parents did. They do their best at school, find some kinds of jobs in the end, and get 9.
in their early twenties. They get on well with their parents, and enjoy their family life. After all, if they don't, they
10.             be British, will they?

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2010年我国西南地区发生严重的旱灾，期间某部队用装有碘化银（化学式为AgI）实施人工降雨，碘化银中碘元素的化合价为 [ ]

A．-1

B．+1

C．+2

D．+5

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如图所示电路中，电阻R₁=R₂=R₃=10Ω，电源内阻r=5Ω，电压表可视为理想电表．当开关S₁和S₂均闭合时，电压表的示数为10V．

（1）电阻R₂中的电流为多大？

（2）路端电压为多大？

（3）电源的电动势为多大？

（4）当开关S₁闭合而S₂断开时，电压表的示数变为多大？

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关于麻痹性肠梗阻的X线表现，错误的是（）

A.易合并腹水

B.不易与低位结肠梗阻鉴别

C.在仰卧位及立位上，气体的形状及位置的变化大

D.因积气而扩张的肠管范围广泛

E.有的来自机械性肠梗阻

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什么是国家信息安全？

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