A、 The radius of the duct is too small.
B、 The diameter of the tube is too small.
C、 The circumference of the pipe is too small.
答案：B
A、 The radius of the duct is too small.
B、 The diameter of the tube is too small.
C、 The circumference of the pipe is too small.
答案：B
A. Another important function of lubricating oil is to protect the corroded metal surfaces.
B. Another important task of the oil is to protect the metal surfaces from corrosion.
C. Preventing the metal surface from further corrosion is the other essential function of the lube.
A. When the light goes off,set the switch to NORMAL.
B. When the light is illuminated,move the switch to NORMAL.
C. When the light is extinguished,move the switch to NORMAL.
A. 量规的精度必须符合适用的质量标准。
B. 选择量规必须参照已有的质量标准。
C. 采购护目镜必须满足相应的质量标准。
A. A three-axis accelerometer gives acceleration data of the horizontal,lateral,and longitudinal axis.The flight data recorder system sensors send data about the position of the flight surfaces and controls the FDAU.
B. A three-axis accelerometer gives accelerating data with the vertical,parallel,and longitudinal axis.The flight data recorder system sensors send data and the position of the flight surfaces and controls to the FDAU.
C. A three-axis accelerometer gives acceleration data along the vertical,lateral,and longitudinal axis.The flight data recorder system sensors send data about the position of the flight surfaces and controls to the FDAU.
A. 这种调整的正确性很重要。
B. 这种更改的正确性很重要。
C. 这种正确的调整是很重要的。
A. Use the correct tools to open the containers for these materials.If you do not follow these prerequisites,injury to your skin and lungs can occur.
B. Get the corrective tools to open the containers for these materials.If you do not obey these precautions,injury to your skin and lungs can occur.
C. Get the proper tools to open the containers for these materials.If you do not observe these precautions,injury to your skin and lungs can occur.
A. A mixture of fuel and oxygen can cause an explosion.
B. A mixture of fuel and nitrogen can cause an burn.
C. A mixture of gas and oxygen should cause an explosion.
A. There is enough oil.
B. Some oil must be drained.
C. More oil must be added.
A. 未经保护,请勿进入发动机测试区域。
B. 未经允许不得进入发动机试车区域。
C. 未经批准,请勿进入发动机测试控制中心。
A. The testing machine will run the tests in manual mode.
B. The test set will automatically run the tests.
C. The test apparatus will give the test parameter automatically.
