天津市2016年中考英语模拟试题

Education isn’t the only goal of CubeSats. Because these tiny, technology-filled boxes are relatively inexpensive to build and can be put together quickly, they’re perfect for testing new technologies that might one day be used on major space tasks.

The biggest challenge now is to find ways to bring the satellites back to the earth after a year or two. Otherwise, major highways of space junk could gradually increase as CubeSats become more common.

Nowdays challenge and high school students are getting a chance to learn what it takes to explore in space. Someday—perhaps a lot sooner than you imagine—you might get to design, build and launch your own satellite. If you do, you’re sure to have fun. And you might also get crazy about science for life.

58.Compared with the traditional ones, the new satellites ___________.

A. need long start-up times       B. are low-cost and small-sized

C. are very hard to operate       D. collect more information in orbit

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