A、 When there are too many positive or subtractive pressure in the fuel tanks the pressure relief valve eliminates damage to the wing structure.
B、 When there is too much plus or minus pressure in the fuel tanks, the pressure relief valve previews damage to the wing structure.
C、 The pressure relief valve prevents damage to the wing structure when there is too much positive or negative pressure in the fuel tanks.
答案：C
A、 When there are too many positive or subtractive pressure in the fuel tanks the pressure relief valve eliminates damage to the wing structure.
B、 When there is too much plus or minus pressure in the fuel tanks, the pressure relief valve previews damage to the wing structure.
C、 The pressure relief valve prevents damage to the wing structure when there is too much positive or negative pressure in the fuel tanks.
答案：C
A. A hydraulic pump operates the motor.
B. A fuel pump operates the motor.
C. A hydraulic motor operates the pump.
A. 电磁阀应如此标明,并应包括表示该阀是弹簧加载到打开位置还是关闭位置的符号。
B. 电磁阀应如此标明,并应包括表示该阀是弹簧加载到打开位置或者关闭位置的符号。
C. 电磁阀应如此标明,但不包括表示该阀是弹簧加载到打开位置还是关闭位置的符号。
A. This CAP has been developed according to FAA AC 91-56 guidelines.
B. FAA AC 91-56 guideline developed the CAP accordingly.
C. This CAP has been developed as a reference of FAA AC 91-56.
A. The maximum allowable difference is 5 mm.
B. The maximum allowable error is 5mm.
C. The maximum permitted diffrence is 5mm.
A. Staff must violate this procedure.
B. All persons must follow this procedure.
C. Personnel must deviate from this procedure.
A. The menu of contents in front of each chapter will Projects covered and the numbers assigned.
B. The catalogue of texts in front of each chapter will list the items covered and the assigned numbers.
C. The table of contents in front of each chapter will list the items covered and the number assigned.
A. Keep the caps off the hoses.
B. Make sure the caps are off from the hoses.
C. Take the caps off the flexible pipe.
A. Confusion may occur due to the large quantity of meanings and synonyms of English words as well as complex sentence structure.
B. The large number of meanings and synonyms of English words can cause confusion, while common sentence structure cannot.
C. Many English words have complex sentence structure, different meanings and synonyms, which can cause confusion.
A. Vertical axis passes horizontally through the center of gravity of an aircraft.
B. Vertical axis passes vertically through the center of gravity of an aircraft.
C. Vertical axis of an aircraft is an imaginary line passing vertically through the center of gravity of an aircraft. The vertical axis is called the pitch axis.
A. 技术文本常常包含很长的词组,这些词组在一个句子中具有一个个词性的功能。
B. 技术文件常常由很长的词汇构成,这些词在句子中的词性只有一种。
C. 技术文件常常包括长词组,在同一句子中这些词的功能是一种词性。
