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. identified
B. launched
C. substituted
D. dissolved
网友回答
A. identified
(答案→)B. launched
C. substituted
D. dissolved
解析：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。