A、 Check valve, that allows fluid blows in one direction completely but blocks all flow in the other direction, is a pneumatic or hydraulic system component.
B、 Oneway valve is a hydro or gaseous system component that allows fluid flows in one direction freely but blocks all flow in the opposite direction.
C、 Check valve is a hydraulic or pneumatic system component that allows full flow of fluid in one direction but blocks all flow in the opposite direction.
答案：C
A、 Check valve, that allows fluid blows in one direction completely but blocks all flow in the other direction, is a pneumatic or hydraulic system component.
B、 Oneway valve is a hydro or gaseous system component that allows fluid flows in one direction freely but blocks all flow in the opposite direction.
C、 Check valve is a hydraulic or pneumatic system component that allows full flow of fluid in one direction but blocks all flow in the opposite direction.
答案：C
A. Make sure that the fuel tanks are correctly grounded.
B. The fuel tanks must be grounded.
C. Make sure that the oil tanks are on the ground correctly.
A. Compressed air will push contamination into the display unit.
B. The display unit will be contaminated by compressed air.
C. Air pressure will push the dirt into the display unit.
A. This document compliments informaiton to the applicable airplane maintenance manual(s).
B. This document provides necessary informaiton to the applicable airplane maintenance manual(s).
C. This document provides supplemental informaiton to the applicable airplane maintenance manual(s).
A. The instructions for taxing in bad weather conditions are found in chapter 6.
B. Chapter 6 provides instructions on pulling up in normal weather conditions.
C. Refer to chapter 6 for instructions on how to park in bad weather conditions.
A. 很多滑油的回油滤都内置旁通活门。当滤芯堵住时旁通活门打开，使得滑油从旁路流过。
B. 很多液压油的回油滤都内置旁通活门。当滤芯堵住时旁通活门打开，使得油液从旁路流过。
C. 很多滑油的回油滤都内置旁通活门。当滤芯故障时旁通活门打开，使得滑油从旁路流过。
A. By way of the control unit, enter the opening in the side of the tank.
B. Get access to the control unit through the opening in the side of the tank.
C. Get access to the control unit by opening one side of the tank.
A. 油箱释压活门在85-90psi之间打开以保护油箱不会超压。
B. 为保护管路不会超压, 释压活门在85-90psi之间打开。
C. 选择活门在85-90psi之间打开以保护油箱正常工作。
A. A hard landing may be the result of shock loading of the engine.
B. Shock loading of an engine may result in a heavy landing.
C. A heavy landing can cause shock loading of the engine.
A. The fire-proof materials and seals are mounted on or about the power unit.
B. The fire-resistant partitions and seals are mounted on the power unit.
C. The fire-resistant partitions and seals are mounted on or about the power package.
A. Technical verbs are the same as other approved verbs in STE to obey the rules .
B. Technical verbs must obey the same rules as other approved verbs in STE.
C. The approved verbs are required to obey the rules in STE as well as the technical verbs.
