70.Those instructions are necessary to carry out the scheduled servicing.

A. 沿四周向内对窗户进行抛光。

B. 以圆周运动方式擦拭窗户。

C. 呈垂直方向给窗户镀膜。

A. Turn the handle of the door until the lower gate is lifted.

B. For lowering the upper door,door handle should be turned.

C. The lever of door should be turned until the lower door opens.

A. If the airframe manufacturer makes any alteration to the component of the text or illustrations,the component manufacturer will use its own masthead.

B. If the airframe manufacturer changes the component manufacturer's text or illustration in any way,he shall apply his own masthead.

C. If the airframe manufacturer alters the text or illustrations of the component manufacturer's in any way,it's own masthead shall be used.

A. 将这个单元拆分为两部分。

B. 将这个单元重组成两部分。

C. 将这个部分拆分为两单元。

A. Detection and coding systems shall be used so that it's easy to isolate faults,repair routes and replace the components.

B. You should use the detecting and coding system that can help to remove faults,repair lines and change the components.

C. To facilitate troubleshooting,repair of circuits,and replacement of components,an identification and coding system should be used.

A. 取一份燃油试剂,然后检查是否有水污染。

B. 取一份燃油样本并做水污染测试。

C. 获取燃油样本后执行测试,目测是否有水的污染。

A. The needle moves horizontally along the gage.

B. The pointer moves vertically along the scale.

C. The indicator moves longitudinally along the edge.

A. 给凸起的固定环和堵塞指示器打保险。

B. 给滚花固定环和堵塞指示器本体打保险。

C. 给带凸边的密封环安装保险丝,以固定指示器本体。

A. 在这种结构中,液压流过这个活门。

B. 在这种构型中,液压旁通这个活门。

C. 在这种型号中,水流旁通这个活门。

A. If you do not obey these precautions,injury to your skin and lungs can occur.

B. It will cause damage to your skin and liver unless you follow the cautions.

C. If you understand the instructions,you body will not be hurt.