1279. 笔记本电脑具有这些主要部件 ( )

3021. Engine fire detection system is system of dual loop( )

3020. 安全扫描器检测金属物体。( )

3019. The system test, which is self-contained and may duplicate other tests, contains all adjustments and tolerances to maintain systems or units at maximum efficiency ( )

3018. Release the pressure from the hydraulic system ( )

3017. Individual wire identification codes are established to assist in tracing circuitry [Figure 5)

3016. Make sure that the lock nut touch the springs( )

3015. Put the tools in the solvent to make the compound soft( )

3014. 用柔软的布将窗户擦亮( )

3013. 接通地面电源( )

3012. Illustrations, figures and tables may be used They should be locatedascloseaspractical to the related portions of the text ( )