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A major search has been_____ for a Malaysian Airlines jet with 239 people on board after it lost contact flying from Kuala Lumpur to Beijing.
A.identifiedB.launchedC.substitutedD.dissolved
B

试题分析:考查动词。A. identified识别;B. launched开展(活动、计划等);C. substituted替换;D. dissolved使消失。句意:在马来西亚航空公司一架载有239人的飞机从吉隆坡飞往北京失去联系之后,一场大型搜索已经展开。故B正确。
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