英语选词填空10空求帮忙sources; because; war; satellites; first; of; ignored; even; which; occasionally; found; but; astronomers; transmission; with There had been formal agreements to reserve at least some radio frequencies for astronomy.Bu
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英语选词填空10空求帮忙sources; because; war; satellites; first; of; ignored; even; which; occasionally; found; but; astronomers; transmission; with There had been formal agreements to reserve at least some radio frequencies for astronomy.Bu
英语选词填空10空求帮忙
sources; because; war; satellites; first; of; ignored; even; which; occasionally; found; but; astronomers; transmission; with
There had been formal agreements to reserve at least some radio frequencies for astronomy.But precisely [181] these frequencies represented a clear channel,the military [182] found it necessary to use them.If the third world [183] ever came,perhaps the radio astronomy would be the [184] to know,their windows to the sky overflowing [185] orders to battle -- management and damage -- assessment satellites in orbit,and with the [186] of coded launch commands to distant points.[187] with no military traffic,in listening to a billion frequencies at once the [188] had to expect some interference.Lightening,automobile engines,direct broadcast satellites were all [189] of radio interference.But the computers had their number,knew their characteristics and systematically [190] them.To signals that were less clear the computer would listen with greater care and make sure they matched no collection of data it was programmed to understand.
英语选词填空10空求帮忙sources; because; war; satellites; first; of; ignored; even; which; occasionally; found; but; astronomers; transmission; with There had been formal agreements to reserve at least some radio frequencies for astronomy.Bu
181 because
182 occasionally
183 war
184 first
185 satellites
186:transmisssion
187 even
188.astronomers
189 sources
190 ignored
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