A、 Make sure that the cabin differential pressure is zero before you unlock the door.
B、 Be sure that the variance of the cabin pressure is zero before you open the door.
C、 Make certain that the difference of the compartment compression is zero before you open the door.
答案：A
A、 Make sure that the cabin differential pressure is zero before you unlock the door.
B、 Be sure that the variance of the cabin pressure is zero before you open the door.
C、 Make certain that the difference of the compartment compression is zero before you open the door.
答案：A
A. 组合室是一个带有外壳和内套筒的圆柱状管路组件。
B. 混合室是一个带有外包装和内衬的圆柱状管路组件。
C. 混合室是一个带有外壳和内套筒的圆柱状管路组件。
A. If they fail,temporary damage can occur.
B. If they drop,permanent injury can occur.
C. If they fall,permanent damage can occur.
A. Make sure that the material and dimensions of the new floor panel are the same with the removed one.
B. Make sure that contour and design of the new floor panel have no difference with the removed one.
C. Make sure that the new floor panel has the same contour and dimensions as the removed floor panel.
A. 不要拧松螺母使其对准。
B. 不要拧紧螺母使其对齐。
C. 不要松动螺栓使其对准。
A. Install a new gasket on the flange.
B. Install a new washer on the fixture.
C. Install a new basket on the fitting.
A. 陀螺仪将在大约 15 秒后变得稳定。
B. 地球仪将在大约 15 秒后变得稳定。
C. 地球仪将在大约 15 秒后变得稳定。
A. Wait for the paint to dry completely before polishing it again.
B. Do not apply the second layer of paint if the first layer has dried thoroughly.
C. Let the first layer of paint dry fully before you apply the second layer.
A. Put a plug on the open end of each pipe.
B. On the opening of each pipe,put a cover.
C. Put a cover on the loose end of the pipe.
A. 空气沿着侧壁和顶板中央流出,分开并同时供气。
B. 出口在侧壁边缘和顶板中央分离空气,以便全面供气。
C. 沿侧壁和顶板中央的出口将空气分开均匀供气。
A. If this step can not stop the leakage,remove the actuator.
B. If this step is not enough to stop the leakage,change the motor.
C. If this step is not sufficient to stop the leakage,replace the actuator.
