A、 In the STE example, this safety description is given as a caution, but if you know about oxygen systems, you also know that oxygen can occur explosions.
B、 In the non-STE example, this safety instruction is given as a caution, but if you know about oxygen systems, you also know that oxygen can cause explosions.
C、 In the non-STE example, caution is given in this safety description. But if you know about nitrogen systems, you also know that nitrogen can cause flames.
答案：B
A、 In the STE example, this safety description is given as a caution, but if you know about oxygen systems, you also know that oxygen can occur explosions.
B、 In the non-STE example, this safety instruction is given as a caution, but if you know about oxygen systems, you also know that oxygen can cause explosions.
C、 In the non-STE example, caution is given in this safety description. But if you know about nitrogen systems, you also know that nitrogen can cause flames.
答案：B
A. A word in lowercase letters is unapproved in STE.
B. A word in bold letters is unapproved in STE.
C. A word in uppercase letters is not approved in STE.
A. Flash the screen with hot water.
B. Fresh the filter with hot water.
C. Rinse filter in hot running water.
A. Do not extend or retract landing gear above this speed.
B. Do not expand or retract landing gear at this speed.
C. Do not put down or retract landing gear by more than this speed.
A. Make sure the cabin pressure relief valve is open.
B. Make sure the cabin pressure outflow valve is open.
C. Make sure the cabin pressure bypass valve is open.
A. 移动装有隔热毯的喷射管或排气锥时要小心。
B. 当你移动喷气式管道或带有绝缘垫的排气孔时要小心。
C. 小心地移动发射管或排气口的保温垫。
A. The shim is t,which is thick by calculating x and y.
B. Calculate the shim,the result of the thickness is x-y .
C. The thickness of the shim is thus calculated: t=x-y.
A. Utilize the dimmer switch and ensure that the light＇s luminosity varies vigorously.
B. Manipulate the dimmer switch to confirm the alteration of the light＇s intensity.
C. Activate the dimmer switch and ascertain that the light＇s intensity undergoes little changes.
A. 确保气流不低于10升/分钟。
B. 确保空气流量为10升/分钟。
C. 确保气流不超过10升/分钟。
A. 确保着陆时切断灯的开关电源连接。
B. 确保着陆灯断开电门的电连接是安全的。
C. 确保着陆灯安全切断了开关电源连接。
A. 支撑柱将地板结构固定在适当位置。
B. 支撑柱将地板结构固定在地面上。
C. 支撑柱适用于稳定的地板结构。
