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问题 选择题

图甲为我国某农村聚落M所在区域的等高线地形图，OP实际水平距离为425米．图乙为沿PQ一线所做地质剖面示意图。M聚落分布于两边山脊对称的宽谷中，当一年中M聚落房屋的正午日影最长时，当地正午太阳高度大致与甲坡坡度相等，且该日M聚落的日照时间从北京时间8:10至17:50，读图文材料回答下列各题。（已知：tan30°=0．58 tan35°=0．7 tan40°=0．84）

小题1:该地的纬度约是    

A．21°N

B．31°N

C．41°N

D．51°N小题2:下列有关该地区的说法正确的是    

A．图乙所示地形为背斜山

B．乙处草坡因地处背风坡，降水少

C．图乙森林为常绿阔叶林

D．M聚落居民发现，该日昼长夜短

答案

小题1:B

小题2:C

题目分析：

小题1:根据材料中信息，OP实际水平距离为425米。根据等高线图，可以判断OP的高差是300米。利用正切值tan35°=0．7，可以计算出OP坡的坡度是35°。当一年中M聚落房屋的正午日影最长时，当地正午太阳高度大致与甲坡坡度相等，即冬至日时，M聚落正午太阳高度是35°。根据正午太阳高度角公式，H=90°-纬度差，可以计算出该地的纬度约是31.5°，所以B对。A、C、D错。

小题2:读图乙，根据岩层的弯曲形态判断，图乙地形为向斜山，A错。根据图甲中的指向标，结合图中坡度、字母等信息，可以判断乙处是迎风坡，降水多，B错。结合前面分析，该地纬度判断，位于亚热带地区，植被为常绿阔叶林，C对。根据材料，该地位于我国，冬至日北半球昼短夜长，D错。

多项选择题

在拌和站设置要求中，针对拌合设备的要求正确的是()。

A.混凝土拌和应采用强制式拌和机，单机生产能力不宜低于90m3/h

B.水、外掺剂可采用流量或人工计量方式

C.沥青混合料采用间歇式拌和机

D.拌和站计量设备应通过当地有关部门标定后方可投入生产

E.拌和站应根据拌和机的功率配备相应的备用发电机
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阅读理解

Many people have been talking about the way in which the world will come to an end in 2012. Everybody wants to find out if December 21, 2012 is the last day of the earth. The rumor has already been spreading for a very long time. The Mayan’s prediction can account for the rumor. According to the rumor, the earth will experience dramatic changes in 2012 and the changes will be disastrous to all of the living creatures on earth. It is widely assumed that a Planet X will return to orbit the solar system. The return of Planet X will have a destructive effect on the solar system as well as on some planets including the Neptune, the Jupiter and the earth. Planet X will cross into their orbits. There’s a possibility that Jupiter will change into a little sun at this time, so folks will be well placed to see two suns in the sky in 2012.

The solar flares (耀斑) that occur in a 11-year cycle will reach their highest point in 2012. The powerful solar flares will affect the magnetic field of the earth and cause disasters. On December 21, 2012, the sun and the earth will line up in the same line at the equator(赤道). The winter solstice(冬至) only occurs once every 25,800 years. The events in the universe are signals that the world will come to an end. As a result of the solar flares, lots of disasters will happen that will destroy the face of the whole earth. Scientists are making the guess primarily based on the Mayan Long Count Calendar.

Many films have been made about the end of the world including End Game by Alex Jones and End Clock: Nostradamus 2012. The former provides insights about the way the world will become one state. After the world government is in place, it’s going to be easy to exterminate 80% of the people in the world. The rest will continue to live with assistance from advanced technology.

No one knows whether the world will end on December 21, 2012: There is no clear answer until the day arrives. Just as the Mayans claim, it will not be the time for the world to end. Instead, it will be the dawn of a fresh start.

小题1:What is the passage mainly about?

A．Information about end-of-the-world predictions.

B．Different opinions about end-of-the-world predictions.

C．Some doubts about end-of-the-world predictions.

D．Destructive effects of the end of the world.小题2:Which of the following things will NOT happen if the end of the world really happens?

A．Humans will see two suns at the same time.

B．The earth will look completely different.

C．The earth and the moon will line up in the same line.

D．The solar flares will become stronger than before.小题3:The underlined word “exterminate” in Paragraph 3 probably means “__________”.

A．save

B．kill

C．help

D．rule小题4:What is the author’s attitude to the rumor that the world will end?

A．Optimistic .

B．Sad.

C．Unconcerned.

D．Scared.
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