897、 However, the systems are independent(独立)and there is no fluid exchange between them. 然而,
这些系统是独立的,它们之间没有流体交换。

　 However, the systems are independent of each other, and they do not exchange fluid.

　 However, the systems depend on each other and they cant exchange fluid.

　 The systems exchange fluid from each other and so they are independent.

正确答案：A

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378、Make sure that the doors are closed during the pressurization test.

377、lt is not permitted to install more than two washers for each bolt. 每个螺栓不允许安装两个以上的垫圈

376、In this example, we calculated the data applicable only to a Type B unit. 在本例中,我们计算的数据只
适用于 B 型机组。

375 、 In these conditions, the mechanical and electrical pitch trim systems will not operate.

374、In the latter case, the title shall be "Pilot's Operating Handbook".

373、If the tower does not respond, use a different channel 如果塔没有反应,使用不同的频道

372、If the bracket touches the plate, remove the unwanted material with a file.

371、If possible, always tell your reader what can occur if the safety instruction is not obeyed.

370、Ground service bus has no power with external power available. 地面服务总线没有电源,但有外部电
源可用。

369、 Fault isolation provides the information used to identify, locate and correct any fault that is predicted
to occur on the airplane.

897、 However, the systems are independent(独立)and there is no fluid exchange between them. 然而,这些系统是独立的,它们之间没有流体交换。