Check the cooling fan belt or add coolant if necessary．
举一反三
- Check the engine oil level and add if necessary．
- It is necessary to remove （） from the cooling spaces.
- The main jobs of the _________ are lubricating, cooling, cleaning and sealing. A: radiator B: oil filter C: engine oil D: cooling fan
- It is not necessary for parents to accompany the kids and to check their 'treats'.( )
- The freight forwarder would prepare all necessary documents for exporter if necessary．