A

A【解析】第二段提到“Then it is filled with air．The pressure inside the plane is greater than it ever?will be when it is high uD in the air．FinaUy．there is aft explosion．”可判断，通过充气加压使飞机爆炸来检测出飞机的薄弱部分，这是tank test的目的，A项表明了tank test的结果，符合题意。B项“Itwill be made sponger．”是测试之后所要做的事，题干中的under the“tank test”是指在测试进行当中，因此不可选B项。