Windows system provides internet firewalls.
举一反三
- This paper discusses the behavior ________ and requirements ________ Internet firewalls.(填入适当的介词)?
- The ignition system provides a ___ to “fire” the engine.
- The coal provides energy to the (heat) ____system of hospitals.
- The endocrine system provides slower but longer-lasting control by hormones.
- The coal provides energy to power the (heat) （） system of hospitals.