A、 Your skin and lungs can be protected.
B、 Your skin and lungs can be harmed.
C、 Your skin and lungs can be harmed suddenly.
答案：B
A、 Your skin and lungs can be protected.
B、 Your skin and lungs can be harmed.
C、 Your skin and lungs can be harmed suddenly.
答案：B
A. Perform these checks without any schedule.
B. Perform these checks immediately.
C. Do these checks regularly.
A. The SMYD1 will limit rudder movement when flaps are up if trailing edge flaps receive data from up limit switch of SMYD1 during yaw damping.
B. The SMYD1 will limit rudder movement after receiving data from up limit switch of trailing edge flaps during yaw damping when flaps are up.
C. The SMYD1 will limit yaw damping to reduce rudder movement when flaps are up If trailing edge flaps receive data from up limit switch of SMYD1.
A. Rivets can be used to separate the two stringers.
B. You can use two rivets to attach the stringers together.
C. Use rivets to connect the two stringers together.
A. Flash the screen with hot water.
B. Fresh the filter with hot water.
C. Rinse filter in hot running water.
A. There is always room for improvement in the effort to describe these steps.
B. It is impossible to list all the steps because there is always room for improvement.
C. Describing these steps need to do a lot of work.
A. Use the tube if it＇s worked into 3.3 feet long.
B. Use a tube whose length is 3.3 feet.
C. The tube which is used is 3.3 feet length.
A. If the pump is not suitable to be used, replace it.
B. If the pump is outmoded, replace it.
C. If the pump malfunctions, change the location for it.
解析：这道题考察的是逻辑推理能力。句子的意思是如果水泵无法维修，就应该更换它。选项A符合题意，因为unsuitable意思是不适合使用，与unserviceable意思相近，所以是正确答案。
举个生动的例子来帮助理解：假设你的手机屏幕坏了，修理店告诉你无法维修，只能更换新的屏幕。这种情况下，你会选择更换新的屏幕，因为旧的屏幕已经无法继续使用了，就像题目中提到的水泵无法维修一样。所以正确的做法是选择更换新的屏幕，就像选择选项A中的意思一样。
A. If the microswitch becomes unserviceable, proceed with the actuator activation procedure to damage the valve.
B. When the microswitch is functional, ensure the deactivation procedure of the actuator is performed to avoid any harm to the valve.
C. If the microswitch malfunctions, execute the actuator deactivation procedure to protect the valve from harm.
A. The operational test of HFS-900D transceivers is an internal functions check of the HF transceiver and it is a BITE test.
B. The BITE test for the HFS-900D transceivers is the operation test that does the inner check of the HF transceiver.
C. The check of the internal functions of the HF transceiver is a BITE test related to HFS-900D transceivers.
A. The exit doors are mainly used for passenger boarding.
B. The exit doors are only used for evacuation.
C. The exit doors are not only used for the passengers to evacuate from the airplane but also used for normal exit.
