单选题
According to the text, why are test flights most dangerous?
A、
The plane may explode in the air.
B、
The pilot may lose control of the plane.
C、
The engines may be damaged.
D、
Too much air may get into the plane.
【正确答案】
B
【答案解析】
[解析] 第三段It is the pilot's job to find out how he can get control of the plane again即是其中原因。
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