对人体产生危害程度最大的电磁波是()。 A.微波 B.超短波 C.中波 D.长波

题型:单项选择题

问题:

对人体产生危害程度最大的电磁波是()。

A.微波

B.超短波

C.中波

D.长波

考点:房地产经纪专业基础环境和景观环境和景观题库
题型:单项选择题

综合填空: 根据句意与所给的首字母补全单词。

     Antarctica (南极洲) is the continent which is the most southern area of land on the Earth and is mostly

(1)c___________ with ice. This is one of the driest and coldest places in the world. But people from all over

the world come to (2)w___________ there. Near the South Pole (南极), three thousand people live together in

a place (3)c____________ Amundsen-Scott Station.

     The station has libraries, cinemas, shops, sports rooms and laboratories. There is electricity, and they have

telephones-the system (系统) that they use to have a conversation (4)w____________ someone in other place.

And they have (5)c____________-electronic or machines that stores information and uses programs to help

them find, organize or change the information.

     But the people here don't (6)t____________ by car, or train, or bus, because there aren't any roads or

railways near the station. They travel by ship, plane, or snow tractor, or with dogs.

     There aren't any trees or flowers there, but there are (7)h___________ of different birds and other animals. 

     Most of the people here are scientists They study plant and animal (8)l___________ and how ice moves.

The ice can tell us about changes in climate. Ray Kingman is an expert at Amundsen-Scott Station,

(9)t__________ us on the phone, "This is my second year here. It's a very interesting and beautiful place, but

life is very hard in the winter. In the summer we can go swimming in hot pools of water. We welcome

newcomers here for further (10)s___________of the continent!"

题型:单项选择题

在肺癌的普查和诊断中占重要地位的检查是

A.X线检查

B.CT

C.MRI

D.痰细胞学检查

E.纤维支气管镜检查

题型:单项选择题

已知A(g)+B(g)C(g)+D(g)反应的平衡常数和温度的关系如下:

温度/ ℃70080083010001200
平衡常数1.71.11.00.60.4
 

回答下列问题:

(1)该反应的平衡常数表达式K=             ,△H    0(填“<”“ >”“ =”);

(2)830℃时,向一个5 L的密闭容器中充入0.20mol的A和0.80mol的B,如反应初始6s内A的平均反应速率v(A)="0.003" mol·L-1·s-1,则6s时c(A)=      mol·L-1, C的物质的量为      mol;若反应经一段时间后,达到平衡时A的转化率为     ,如果这时向该密闭容器中再充入1 mol氩气,平衡时A的转化率为         

(3)判断该反应是否达到平衡的依据为      (填正确选项前的字母):

a.压强不随时间改变       b.气体的密度不随时间改变

c.c(A)不随时问改变        d.单位时间里生成C和D的物质的量相等

(4)1200℃时反应C(g)+D(g) A(g)+B(g)的平衡常数的值为             

题型:单项选择题

政府对政府出资项目和非政府出资项目都要进行的管理内容是( )。

A.实行稽查管理

B.委托相关资产管理公司或国有投资公司进行管理

C.组织对工程项目建议书和可行性研究报告进行评审

D.通过政策、法律法规、税收、审批等手段,对建设项目在投资方向、外债规模和环境保护等方面进行控制和管理

题型:单项选择题

黄某与某旅行社签订了国内旅游组团标准合同,并一次性付清团款。在该旅行社的组织下,黄某等30人去九寨沟、黄龙旅游。但游览九寨沟后赶赴黄龙时,天降大雨,随时有塌方的可能。导游人员考虑到游客的生命安全,在征得车上26名游客同意(黄某等4人反对)的前提下,取消了黄龙旅游计划,改游牟尼沟,并报告了旅行社。回来后,黄某等4人认为旅行社违约取消黄龙景点,投诉了该旅行社,要求旅行社退回全部费用并承担相应损失。导游人员的做法是否正确?为什么?

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