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lesson 21 900句听力填空-8(一空一词,默认所有字母都小写)Heavy _____ ____ is expected to last for another 30 minutes.Request to terminate approach and _____ ____.[音频]

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lesson 21 900句听力填空-7(一空一词,默认所有字母都小写)We have received reports of _____ _____ ranging from ground up to 5000 feet. Request diversion.[音频]

lesson 21 900句听力填空-6(一空一词,默认所有字母都小写)Request holding instructions. We’ll attempt another approach when the _____ _____become lighter.[音频]

lesson 21 900句听力填空-4(一空一词,默认所有字母都小写)Roger _____ _____. Request to _____our approach.[音频]

Inperiodsofrisingprices ,FIFOwillproduce ().

A. thesamenetincomeasweighted-averagecost
B. highernetincomethanweighted-averagecost
C. lowernetincomethanweighted-averagecost
D. alloftheabove

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