Worn out ring grooves should be （） to

1、Expansion tank should be used to remov

Expansion tank should be used to remove （） from cooling water.AscaleBsludgeCchemicalsDair

2、The piston ring grooves for a standard

The piston ring grooves for a standard engine are （）Achromium-plate against wearBanti-corrosion treatedCwhite metal lined against wearDflame hardened against wear

3、Tools with （）handles should be used to

Tools with （）handles should be used to check electric circuit.AplasticBmetalCstainless steelDcopper

4、Which command should be used to captur

Which command should be used to capture network traffic between the localhost and a host named ‘webserver’?（）Atcpdump webserverBtcpdump host webserverCtcpdump -hostname webserverDtcpdump -print -h webserver

5、Head tank should be used to remove （）

Head tank should be used to remove （） from cooling water.AscaleBsludgeCchemicalsDair

6、Which file should be edited to manuall

Which file should be edited to manually add a printer?（）A/etc/prtconfB/etc/qconfigC/etc/lpconfigD/etc/prtconfig