________ are used to protect your feet.A.HelmetsB.Safety gogglesC.Safety boots

● Firewall is a ___（74)___ mechanism used by organizations to protect their LANs fromInter

_______ are used to protect your ears.A.Ear defendersB.Safety glovesC.Overalls

____ is used to control, modulate, monitor and protect generator set.A.Control panelB.Load

The author uses " You are the salt of the earth" in the first paragraph to imply that_____

There are a large number of reference books ______ to you; you can make use of them at any

You are required to (fast) ______ the seatbelt when driving so as to protect yourself.