The English Channel separates the isla

1、Who were the ancestors of the English

Who were the ancestors of the English and the founders of England?（）AThe Anglo-Saxons.BThe Normans.CThe Vikings.DThe Roma

2、I remember （）the oil separator the day

I remember （）the oil separator the day before yesterday But it failed again.Ato repairBto be repairedCrepairingDbeing repaired

3、The separating effect of oil separator

The separating effect of oil separator is not very good, the reason may be（）Atoo little seal waterBimproper gravity discCoil discharging pump not working very wellDlow water level of the working water

4、There isn’t any separation（）the copper

There isn’t any separation（）the copper bars.AinBoverCamongDbetwee

5、The principle of separation by which a

The principle of separation by which all commercially available oily water separators function is （） differential between oil and water.Athe temperatureBthe viscosityCthe gravityDthe size

6、In the 17th century,the English g

In the 17thcentury,the English government encouraged people from Scotland and Northern England to emigrate to the north of Ireland because（）Athe...