Check the cooling fan belt or add coolant if necessary．
无需讲解:)可讲可不讲:)必需讲解
举一反三
- Check the engine oil level and add if necessary．
- It is necessary to remove （） from the cooling spaces.
- 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．
- Whilst the engine is turning， check to see that no water is leaking into the crankcase， scavenge air belt， or from （）.
内容
- 0
Gestures are necessary to add emphasis and to persuade. However, Gestures must not be repetitive.
- 1
Prior to departure, which of the following is not necessary? A: To check all monitoring systems. B: To check the fire-fighting systems. C: To stand by the engines. D: To have a meeting.
- 2
All the risks should be calculated in advance.This is necessary.可改写为：It is necessary that all the risks should be calculated in advance.
- 3
Column headings of a table consist of headings that identify the items listed in the columns below them, subheadings as necessary, and units of measurement as necessary.
- 4
Complete the sentences by using infinitives. Add a preposition after the infinitive if necessary. My friend offered ______ me a little money.