问题描述：
[单选]
（英英释义）The first step in listing possible causes of each trouble to show what sections of the system may be at fault．
A．To show what sections of the system may be at fault,listing possible causes of each trouble 15 the first thing we should do.
B．What sections of the system may be at fault depends on the first step in listing possible causes of each trouble.
C．To show what sections of the system may be at fault is the first step when you list possible causes of each trouble.
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上一篇：（英英释义）The doors inside the fuselage are installed in the fixed partitions．Include items such as structure，latching mechanisms，handles，lining，etc．Does not include doors installed in the movable partitions which are covered in Chapter 25．
下一篇：（英英释义）The format of the cruise performance presentation is at the discretion manufacturer but should not rely on devices such as a power computer．
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