人类活动对生态平衡的破坏主要包括 A.植被的破坏  B.食物链的破坏  C.洪涝

题型:选择题

问题:

人类活动对生态平衡的破坏主要包括

A.植被的破坏 

B.食物链的破坏 

C.洪涝灾害  

D.建造沼气池

考点:探究实验:废电池对生物的影响人类活动对生态环境的危害保护生态环境探究实验:酸雨对生物的影响
题型:选择题

阅读理解。

Twin singers

     Take a careful look. The two girls look very much like twins-there are hardly any differences. But

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Climbing to the top

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years, tens of thousands of people have tried to climb the dangerous mountain…

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Home of Olympic dreams

     When the 29th Olympic Games are held in Beijing in 2008, sports players from all over the world

will get together and it will be a place where many dreams will come true…

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Water for the future 

     It is the source (来源) of all life and we need it every day. But the world's population is growing fast,

and we are short of…

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1. If you want to read about sports, which dates will you choose? [ ]

A. 2003-05-22 and 2003-05-06.

B. 2003-05-06 and 2003-04-09.

C. 2003-04-09 and 2003-03-22.

D. 2003-03-22 and 2003-05-22.

2. People in the world are now short of             . [ ]

A. pop music

B. exciting sports

C. Olympic dreams

D. fresh water

题型:选择题

李师傅4小时做20个零件,平均每小时做______个零件.平均做一个零需要______小时.

题型:选择题

何某,男性,56岁。喉中哮鸣有声,胸膈烦闷,呼吸急促,喘咳气逆,咳痰不爽,痰黏色黄,烦躁,发热,恶寒,无汗,身痛,口干欲饮,大便偏于,舌苔白腻,舌尖边红,脉弦紧。此病证的证机概要是()

A.寒痰伏肺,遇感触发,痰升气阻,肺失宣畅

B.痰浊伏肺,风邪引触,肺气郁闭,升降失司

C.哮病久发,痰气瘀阻,肺肾两虚,摄纳失常

D.痰热蕴肺,壅阻气道,肺失清肃

E.痰热壅肺,复感风寒,客寒包火,肺失宣降

题型:选择题

与CT相比,下列关于SPECT的说法错误的是

A.成像技术为计算机断层

B.射线源为放射性核素

C.形态与功能相结合,重在代谢功能研究

D.成像参数为衰减值

E.射线入射方式为体内向体外发射

题型:选择题

我国对公务员的行政处分有()种。

A.5

B.6

C.7

D.8

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