Equivalent substitutes can be used.

A. The aim of STE is that readers all over the world can easily understand the technical texts and that writers who are responsible for preparing technical texts know how to prepare them in a easy method.

B. The objective of STE is to provide writers with general principles on how to prepare technical documents in a clear, simple and distinct manner that readers all over the world can easily understand.

C. The function of STE is to describe how to prepare technical texts in a easy, clear and specific way and to allow readers all over the world to understand difficultly.

A. Words with lowercase letters are allowed in STE.

B. STE dictionary is permitted to use the UPPERCASE letter word.

C. In STE, a word in capital letters means that it is approved.

A. Advisory circular must always be carried out on aircraft.

B. Advisory circular is the procedure that must be used when performing maintenance on an aircraft.

C. FAA provides advisory circular which is not always carried out on aircraft.

A. They comprise the three parts as follows:tail assembly,the structures at the rear of the airplane ,structures forming part of and attached to the wing.

B. They include three parts,one of them is tail assembly,one of them is the structures part at the rear of the airplane,one of them is structures part that forming part of and attached to the wing.

C. They include two parts,one of them is tail assembly at the rear of the airplane that serve to control and maneuver the aircraft,another of them is structures part that forming part of and attached to the wing.

A. Overhaul of any components covered in this chapter shall be completed in accordance with data other than those provided by the manufacturer.

B. None of the components covered by this chapter shall be overhauled except in accordance with the manufacturer＇s data.

C. All components covered in this chapter must be overhauled according to the technical data provided by the manufacturer.

A. Deflate the pressure of tire to the certain value.

B. Provide pressure with nitrogen to the required value for the tire.

C. Depressurize the tire to the demanded value.

A. The CAP compiler should determine the format and layout, it is desirable that the format and layout should be similar to the compiler＇s current documents.

B. The format and layout should be determined by the CAP producer, it is intended that the format and layout shall be similar to the producer＇s existing files.

C. The format and layout should be determined by the CAP producer, recognized that it is desirable the format and layout should be the same as the producer＇s existing documentaries.

A. For "emergency", the related failure should be responded immediately, for example, the total engine failure, fire or smoke, sudden cabin pressure lost.

B. An "Emergency" almost including a serious failure that requires later response, such as a total engines failure, flame out or smoke, or rapid cabin pressurization.

C. For "emergency", the related failure should be treated immediately, for example, the total engine is not malfunctioning, fire or smoke, sudden cabin pressure lost.

A. Make sure the drain hose＇s open end is oriented in align with the structure.

B. Direct the open end of the drain hose away from the storage construction.

C. Ensure that the open end of the drain hose faces away from the structure.

A. The schematic diagrams need to list a lot of instructions, so the items listed are ordered according to certain rules, this is the order in which the items are placed on the plane.

B. There are schematics which need to list a lot of items, so the items listed should be sorted according to certain rules, such as the order in which the items are placed on the plane.

C. List a large number of schematics in logical order, such as the position of the items on the plane.