509.Before you make the hole,make sure that the point of the drill bit is sharp.

A. This software is only acceptable by the assigned handling system.

B. This software is compatible only with the specified operating system.

C. This software only corresponds to its designed operating system.

A. 不论怎样的“危机”大多数总是会出现需要马上快速反应的故障,比如全动力故障,着火或烟雾,或者客舱的快速释压。

B. 可是一个“危急情况”几乎总伴随着故障,需要立即快速反馈,比如一个动力装置故障,着火或烟雾,或快速客舱减压。

C. 然而,“紧急情况”几乎总是涉及需要立即和快速响应的故障,如整个动力装置失效,火灾或烟雾,或座舱快速失压。

D. C.然而,“紧急情况”几乎总是涉及需要立即和快速响应的故障,如整个动力装置失效,火

E. C.然而,“紧急情况”几乎总是涉及需要立即和快速响应的故障,如整个动力装置失效,火灾或烟雾,或座舱快速失压。

A. If a word is only understood by a very small number of people in a specific technical area,it will cause interference in communication.

B. If a word is only understood by a very small number of people in a specific technical area,it will cause disturbing in negotiations..

C. If a word is only understood by a very small number of people in a special skill area,it will cause interference in communication.

A. Do this procedure again.

B. Repeat this procedure.

C. Do this procedure two times.

A. Record the test results.

B. Record the check results.

C. Test the result on the record.

A. During engine run,the number 1 engine oil pressure watch swings.

B. During engine run,the number 1 engine oil pressure gauge fluctuates.

C. During engine run,the number 1 engine oil pressure indication moves.

A. 不要改变路线的管道。

B. 不要改变管道的长度。

C. 不要改变管道的走向。

A. Clamps should be spaced at intervals not exceeding 24 inches.Clamps on wire bundles should be selected so that they have a snug fit without pinching wires.

B. Pins should be spaced at intervals not exceeding 24 inches.Pins on harness should be selected so that they have a snug fit without pinching wires.

C. Pins should be spaced at intervals not exceeding 24 inches.Pins on harness should be selected so that they have a snug fit without scratching wires.

A. 接通断路器。

B. 打开电路接头。

C. 拔出跳开关。

A. 螺旋桨恒速机构故障。

B. 螺旋桨恒速机构被挡住了。

C. 螺旋桨恒速传动机构不在这个位置。