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    B Below is a table which shows the meltingand 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 4.The underlined word`substances'means`a type of' . A.matter B.liquid C.solid D.gas 5.Which of the four should be a liquid at-90 degrees? A.water B.alcohol C.nitrogen D.oxygen 6.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 7.In order to change water from a solid to a liquid energy must be . A.removed B.added C.created D.destroyed 【查看更多】

     

    题目列表(包括答案和解析)

     

    B

    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

    4.The underlined word‘substances'means‘a type of'_________.

    A.matter        B.liquid            C.solid         D.gas

    5.Which of the four should be a liquid at-90 degrees?

    A.water         B.alcohol           C.nitrogen      D.oxygen

    6.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

    7.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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    B

    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

    4.The underlined word‘substances'means‘a type of'_________.

    A.matter        B.liquid            C.solid         D.gas

    5.Which of the four should be a liquid at-90 degrees?

    A.water         B.alcohol           C.nitrogen      D.oxygen

    6.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

    7.In order to change water from a solid to a liquid energy must be _________.

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

    查看答案和解析>>

    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

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

    A.matter                                            B.liquid

    C.solid                                              D.gas

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

    A.water                                             B.alcohol

    C.nitrogen                                         D.oxygen

    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

    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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