647、The function and operation of each unit in the system should be described as well as the location of the units.

　The function, operation and location of each unit in the system should be described.

　The function and operation of each unit in the system should be described. The location of the units shouldn’t be described.

　The function, operation and locations of each unit in the system should be deleted.

正确答案：A

解析：

解析:注释: as well as=and 以及,和 it described 描述; deleted 删去,删除。

841、 adjust the indicator to zero once there is contact with the elevator tab leading edge

840、 Adhere to the safety instructions.

839、Add solvent to make the paint more liquid.

838、 ADD FLUID TO the HYDRAULIC RESERVOIR AS NECESSARY.

837、A review of test results applicable to the design was made.

836、A pressurized system can cause injury to persons when they do, work on it.

835、A list of Page Effectivity should be provided the front of each Manual

834、A list of corresponding serial/unit numbers (or other identifying information) is in a correspondingcolumn on the right Side of the page

833、A CAP is the primary document containing the procedures for the continuing airworthiness of theairplane.

832. 2/hours are necessary to do the procedure.