题干

世界上最深的马里亚纳海沟地处北太平洋西部海底,是太平洋板块在这里俯冲到另一大洋板块之下形成的。下列说法正确的是(   )  

A:马里亚纳海沟是由地球外力作用形成的

B:马里亚纳海沟与东非大裂谷的形成原因相同

C:两个板块相互碰撞、挤压形成马里亚纳海沟

D:该地附近地壳稳定,一般不会出现火山和地震

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答案(点此获取答案解析)

C

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阅读理解

    Oh my God, the robots are taking over! We're doomed! Doomed! Now that I've gotten that out of my system, it's become clear that while we may or may not be doomed, the robots are taking over. The latest example is the government's new guidelines for self-driving cars.

    Tesla, Google and Uber are already testing driverless cars in cities across America. Uber chief executive Travis Kalanick is among those predicting that by 2021, self-driving cars will play a big part in urban settings.

    Nearly 40,000 people died last year in this nation in automobile-related accidents, and we believes driverless cars can save tens of thousands of lives annually.

    Makes sense. Robot drivers are less likely to get drunk, drive without a license, text while driving or feel agitated at the scene of a pileup. On the other hand, I wonder how these highly sensitive cars will react, with walkers constantly dashing into the street. Will they jam on the brakes every 10 seconds?

    But there's a bigger picture. Not only are robots replacing humans behind the wheel, but behind the work desk, in warehouses, senior homes, you name it. Robots aren't just taking over in the workplace.

    The question is, where can't a robot function better than a human? How about writing songs? A robot can go through every combination of notes in record time and come up with a pleasing melody. The lyrics might be a different story. Is a Grammy-winning song co-written by Hank Human and R-3071 in our future?

    Finally, it's only a matter of time until we have robot politicians and presidential candidates. Why not? They can be programmed to be experts in world and domestic affairs and come up with the best solutions without corruption and bad humors.

     Actually, it's too bad such technology isn't available in 2016. Pretty sure the robot would win in a landslide.