A、 Each of the two life vests located at L2 entry door flight crew station is damaged.
B、 Each of the two life vests located at L2 entry door flight crew station is out of time limit.
C、 Each of the two life vests located at L2 entry door flight crew station is out of service.
答案：B
A、 Each of the two life vests located at L2 entry door flight crew station is damaged.
B、 Each of the two life vests located at L2 entry door flight crew station is out of time limit.
C、 Each of the two life vests located at L2 entry door flight crew station is out of service.
答案：B
A. Clean the elastic surfaces that are transparent.
B. Clean the plastic surfaces that are not transparent.
C. Clean the plastic surfaces that are not vague.
A. Check the fluid prior to mixing.
B. Prior to checking the fluid, ensure it has been mixed.
C. Never mix the fluid before testing.
解析：这道题考察的是在检查新液体之前应该进行充分混合的原则。正确答案是B:Prior to checking the fluid, ensure it has been mixed.
解析：在检查新液体之前，首先要确保它已经被充分混合。如果液体没有被充分混合，可能会导致检查结果不准确，影响后续的使用效果。因此，在进行任何检查之前，都应该确保液体已经被充分混合。
举个生动的例子来帮助理解：就好像做蛋糕一样，如果在混合面粉、鸡蛋和牛奶之前就开始检查其中的某一种食材，那么最后做出来的蛋糕可能会出现问题。只有在所有食材都充分混合之后，才能够准确地检查蛋糕的质量。所以在检查新液体之前，也要确保它已经被充分混合，这样才能够得到准确的检查结果。
A. The items in the Emergency Procedures check list are determined to be essential in aid of the pilot in an emergency and should be limited to the minimum number.
B. A limited number of items in the Emergency Procedures check list are determined to be essential to aid the pilot in an emergency.
C. To aid the pilot in an emergency, it is determined that the Emergency Procedures check list should contain only essential items.
A. The responsibility of ABC is not to modify the airplanes that belong to STC.
B. It is not STC＇s responsibility to modify ABC＇s aircraft.
C. ABC is not in charge of the aircraft modified by STC.
A. The flap angles can not be found in Table 1.
B. The flap angles are stated in Table 1.
C. In Table 1, there are no flap angles.
A. Operator is in charge of the maintenance of the handbook.
B. The handbook should be kept current by the operator.
C. The operator should store the handbook in a proper status.
A. The values must be less than the approved differences.
B. The values must not exceed the allowable differences.
C. The values must be less than the allowable differences.
A. When stop the engine, make sure that the engine decelerates to 500 RPM.
B. If the engine decreases to 500 RPM, you must stop it.
C. When the engine RPM decreases 500, you＇d better stop the engine.
A. Troubleshooting can only be performed after the cause of the malfunction has been found out.
B. You should perform troubleshooting according to the procedure and find out the technical failure.
C. According to the procedure, perform the troubleshooting to solve the cause of the malfunction.
A. Put sealant around each screw hole.
B. Seal each screw hole.
C. Put each screw hole into sealant.
