【科学60秒】是冬眠还是永眠？_英语听力练习mp3下载-科学-沪江听力酷

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【科学60秒】是冬眠还是永眠？

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As many of us broil in August heat, the Mars Rover Spirit is ___1___ to survive a far more brutal season—a Martian winter. Spirit’s been on Mars since January 2004 and already survived previous winters, which run from May through November. With sunlight reaching Spirit ___2___, the rover hibernates and uses the scant solar power to recharge batteries and heat itself to –40 degrees [Fahrenheit].
At least, that’s what’s happened in previous winters. This winter, the game little unit just doesn’t have enough juice to keep its heaters on, so temperatures inside the rover will ___3___ a frigid –67 degrees Fahrenheit.
When NASA scientists began signaling Spirit on July 26, they hoped to receive a communications beep back—but so far there’s only silence.
The researchers say that in about two months sunlight will start to increase again through March 2011. If we haven’t heard from Spirit ___4___, then the likelihood is that we never will. The rover was designed to work on Mars for three months, but was mobile for more than five years. Now mission scientists wait through the Martian winter to see if this ET will ___5___.