Below is a table which shows the melting(液化)and boiling points of common substances.Study the table.Then do Numbers 4—7.SubstanceMelting point(C)Boiling Poi-高中英语-n多题

◎ 题干

Below is a table which shows the melting(液化)and boiling points of common substances.Study the table.Then do Numbers 4—7.

Substance	Melting point(C)	Boiling Point(C)
Water Alcohol Nitrogen Oxygen	0 –117 –210 -218	100 78 –196 –183

小题1:The underlined word‘substances'means‘a type of'_________.

A．matter	B．liquid
C．solid	D．gas

小题2:Which of the four should be a liquid at-90 degrees?

A．water	B．alcohol
C．nitrogen	D．oxygen

小题3:Mixing alcohol and water is often used to wash windscreens of cars during the wintertime because _________.

A．it is easier for alcohol to change into gas

B．alcohol is not easily separated from water

C．alcohol freezes at lower temperature than water

D．the mixture is not expensive

小题4:In order to change water from a solid to a liquid energy must be _________.

A．removed	B．added
C．created	D．destroyed

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