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【单选题】
调制解调器 (Modem) 的功能是实现( )A.
模拟信息与数字信号的转换
B.
数字信号的编码
C.
模拟信号的放大
D.
数字信号的整形
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举一反三
【简答题】If you are planning to spend your holidays in Yellowstone National Park in summer, what should you take with you?
【简答题】Which of the following best describes Yellowstone's weather?
【单选题】The world's first national park, Yellowstone National Park , was established in Wyoming in 12 to protect an area of ______ natural beauty.
A.
incredulous
B.
incredible
C.
edible
D.
believable
【单选题】Visitors to Yellowstone Park ______ consider their impact on the natural environment, leaving behind litter and other damage.
A.
nearly
B.
seldom
C.
ever
D.
yet
【单选题】Yellowstone National Park is (one of) the (older parks) in the United States. It was (established) by Congress (in) 1872.
A.
one of
B.
older parks
C.
established
D.
in
【单选题】Why does the professor think Ann would be interested in going to Yellowstone?
A.
She is from Yellowstone.
B.
She needs the money.
C.
She has been studying animal diseases.
D.
Her thesis adviser is heading the project.
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