问题 选择题

如图中的MP、MQ为部分晨昏线,且MQ线所跨经度为90°。阴影所在的经度范围与全球其他地区日期不同。读图,回答问题。

小题1:此时太阳直射点的地理坐标为

A.20N,180

B.20N,120E

C.20S,0°

D.20S,60E小题2:以下叙述正确的是

A.PM线为晨线的一段

B.此时全球昨天与今天范围之比为1

C.此时期正处于北极附近观察极光现象的好季节

D.此日M地日出时刻为当地时间12点

答案

小题1:D    

小题2:C

本题考查晨昏线图的综合判读。

小题1:阴影所在的经度范围与全球其他地区日期不同,则P、M点所在经线其一为0时;其二为180°;根据MP、MQ为部分晨昏线,则M点为晨昏线与70°S纬线的切点,判断M点所在经线为0时或12时;两者结合说明M点所在经线为0时;P点所在经线为180°;晨昏线PMQ以北为夜半球,说明70°S以南出现极昼,则太阳直射点的纬度为20°S,M点所在经线为0时;P点所在经线为180°,则M点的经度为120°W,计算12时所在的经线(直射点所在的经线)为60°E。故选D项。

小题2:A项PM为昏线的一部分;错误。B项此时全球昨天和今天之比为1/5;错误。C项,此时太阳直射点位于20°S,接近冬至日,则北极附近出现极夜。C项说法正确。D项M点出现极昼,日出时间为当地0时;错误。

单项选择题
单项选择题

Sometimes geopolitical lessons come from the strangest places. With Eric Schmidt stepping down as CEO of Google and replaced by founder Larry Page, I can’t help but wonder if world leaders are taking note. Google perfected the horizontal business model. To the delight of enthusiasts of David Ricardo, the comparative economist, the company does one thing really well search and has built an ecosystem for others to flourish using it as a platform.

Contrast this with IBM and AT&T, long past their expiration dates as successful vertical companies. It’s no coincidence that the Soviet Union and IBM, two raging, top-down, command-and-control systems, collapsed at about the same time. What do I mean by vertical In its heyday, IBM did everything from soup to nuts. Designed chips, wrapped plastic around them, wrote operating systems and applications, and then sold and serviced mainframes. The giant captured half of computer-industry sales and 80 percent of profits until horizontal companies Intel and Microsoft knocked it out at its knees. AT&T owned phones and switches and long-distance lines until a very horizontal Internet and companies like Skype changed the economics of the phone call. These same dynamics are now driving the world economy into a productive horizontal enterprise. And it’s about time.

Economies are about increasing the standard of living of their participants. If you don’t have an economic system to create productivity, you end up stealing it from your neighbors. Think Roman Empire. Or the British who colonized large parts of the world to lock up natural resources to plug into their manufactories. Both very vertical. As of 1989, the United States of America became the world’s sole superpower. But what is America going to do with this status Unlike past empires, there’s no incentive to take over the rest of the world. Why take over a country and deal with the headaches of a welfare system, and have to fix the plumbing in Uzbekistan, when you can buy its output on the cheap, even ordering its goods over the Web Despite all the protests, globalization instills peace. Trade now represents 26 percent of world GDP, up from 18 percent in 1990.

Globalization has linked the free world in a smart horizontal alliance. Computers, cell phones, and fiber optics are not made in any single country to be exported worldwide, but instead have components and labor from more than 30 inseparable countries, including China and Vietnam. Horizontal rules!

Without much forethought or planning, the world has structured itself into a horizontal wealth-creating and peace-maintaining system—a productive system that actually increases the standard of living of all the participants, not just those in the United States. America still sits on top of the heap, sure, but wealth has increased for every country, company, and person that contributes. And they get rich not by stealing from the rest of the world, but by adding value to the food chain. Just ask Google.

It is implied in the last paragraph that Google could create miracle because()

A. it has distributed its service to every corner of the world

B. it has adapted successfully to the changed economics

C. it has helped to raise the living standards of the world

D. it has not stolen technology from the rest of the world