685.The loading conditions together with the resulting margins of safety
were evaluated.

A. 　as you do the valve test, ensure that there is no leak.

B. 　while you do each step of the valve test,ensure that there is no leak.

C. 　while you do each step of the valve test, make sure that there is no
leakage.

A. 　Adjust compass system 1 until it agrees with compass system 2.

B. 　Synchronize compass system 1 with compass system 2.

C. 　Regulation compass system 1 until it agrees with compass system 2.

A. 　做腐蚀检查。

B. 　做损害检查。

C. 　检查由腐蚀造成的损伤。

A. 　Instead of using the actual date of issue on each page of an original
issue of a Handbook, the words "original issue" may be used.

B. 　The actual release date should not be used on each page of this
handbook.The term "Ahead release"Should instead be used.

C. 　In place of using the actual date of release on each page of an original
issue of a handbook,the letters"Original issue"Have to be used.

A. 　Calibrate the hygrometer to the celsius scale.

B. 　Calibrate the thermometer to the celsius scale.

C. 　Calibrate the clinometer to the celsius scale.

A. 　Let the temperature increase until it is the same as the ambient
temperature.

B. 　Wait for a few minutes until the temperature of the component exceeds
the ambient temperature.

C. 　Let the component cool down until its temperature is the same as the
ambient temperature.

A. 　INCIDENT

B. 　THING

C. 　IN FACT

A. 　ADHERE

B. 　FOLLOW

C. 　OBEY

A. 　This handbook includes the documents required to be finished to the
pilot by the federal aviation regulations and additional information
approved by the operator and contains the FAA approved airplane flight
manual.

B. 　This handbook includes the material required to be furnished to the
pilot by the federal aviation regulations and additional information
provided by the manufacturer and constitutes the FAA approved airplane
flight manual.

C. 　This aviation regulations,material provided to pilots and accurate information
provided by the manufaactures,and establishes the FAA approved airplane
flight manual.

A. 　 如果不同时这样做,则会卡住定位销。

B. 　 如果不同时这样做,则会导致定位销磨损。

C. 　 如果不同时这样做,则会导致定位销脱落。