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    Water,________seems so simple and common, is___________makes life_________.

    A. that; that; possible                          B. which; that; impossible           

    C. which; what; possible                             D. what; which; possible

    C

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    It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?
    Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!
    You Will Need:
    ● 3 cups of warm water
    ● Measuring cup (量杯)
    ● Wide-mouthed jar
    ● Salt
    ● Spoon
    ● Raw (生的)potato
    You Will Do:
    1. Pour 1.5 cups of warm water into the jar.
    2. Add 1/3 cup of salt.
    3. Stir(搅拌) until the salt is completely dissolved.
    4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.
    5. Gently place the potato into the jar. Do not drop it.
    What Will Happen:
    The potato will sink— but only halfway!
    Why?
    Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.
    The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.
    【小题1】In the experiment, what should you do right after you pour the water over the spoon?

    A．Add the salt to the water.B．Stir the salt into the water.
    C．Place the potato in the jar.D．Pour warm water into thejar.
    【小题2】In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?
    A．It is easier to see what you are doing.
    B．It pushes the fresh water to the bottom.
    C．It will keep the water from coming out.
    D．It will keep the liquids from mixing together.
    【小题3】In which step of the experiment do you add the salt?
    A．Step 1B．Step 2C．Step 3D．Step 4
    【小题4】What does the underlined word “gently” mean?
    A．CarefullyB．QuicklyC．SecretlyD．Silently

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    科目：高中英语 来源：2010—2011学年新疆乌鲁木齐市第八中学高一下学期期末考试（英语） 题型：填空题

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    科目：高中英语 来源：2014届浙江东阳南马高级中学高三9月月考英语卷（解析版） 题型：完型填空

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    1.A．full                  B．rich                        C．few                    D．enough

    2.A．And                 B．Yet              C．Still                  D．Thus

    3.A．thinner             B．stronger               C．worse            D．healthier

    4.A．attitude            B．assumption             C．instruction             D．account

    5.A．assisted    B．tended           C．managed               D．intended

    6.A．make                B．absorb                 C．select                 D．replace

    7.A．attacked            B．caught                 C．froze                   D．cheated

    8.A．operation           B．taste                       C．message          D．point

    9.A．firmly               B．completely       C．hardly           D．generally

    10.A．deal                       B．defend                C．survive                 D．observe

    11.A．similarly   B．differently                 C．gradually               D．commonly

    12.A．pull               B．take                   C．break                   D．give

    13.A．for the lack of   B．in the face of   C．in exchange for   D．as a result of

    14.A．handle            B．carry          C．follow                  D．inspect

    15.A．rolling             B．using                         C．building                 D．making

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    17.A．far          B．long              C．ever             D．even

    18.A．feelings           B．senses                   C．ideas            D．influences

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    科目：高中英语 来源：2014届辽宁省沈阳市四校协作体高二上学期期中考试英语试卷（解析版） 题型：单项填空

    It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?

    Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!

    You Will Need:

    ● 3 cups of warm water

    ● Measuring cup (量杯)

    ● Wide-mouthed jar

    ● Salt

    ● Spoon

    ● Raw (生的)potato

    You Will Do:

    1. Pour 1.5 cups of warm water into the jar.

    2. Add 1/3 cup of salt.

    3. Stir(搅拌) until the salt is completely dissolved.

    4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.

    5. Gently place the potato into the jar. Do not drop it.

    What Will Happen:

    The potato will sink— but only halfway!

    Why?

    Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.

    The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.

    1.In the experiment, what should you do right after you pour the water over the spoon?

    A．Add the salt to the water.                 B．Stir the salt into the water.

    C．Place the potato in the jar.                 D．Pour warm water into thejar.

    2.In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?

    A．It is easier to see what you are doing.

    B．It pushes the fresh water to the bottom.

    C．It will keep the water from coming out.

    D．It will keep the liquids from mixing together.

    3.In which step of the experiment do you add the salt?

    A．Step 1            B．Step 2            C．Step 3            D．Step 4

    4.What does the underlined word “gently” mean?

    A．Carefully          B．Quickly           C．Secretly           D．Silently

     

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    科目：高中英语 来源： 题型：单选题

    It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?
    Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!
    You Will Need:
    ● 3 cups of warm water
    ● Measuring cup (量杯)
    ● Wide-mouthed jar
    ● Salt
    ● Spoon
    ● Raw (生的)potato
    You Will Do:
    1. Pour 1.5 cups of warm water into the jar.
    2. Add 1/3 cup of salt.
    3. Stir(搅拌) until the salt is completely dissolved.
    4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.
    5. Gently place the potato into the jar. Do not drop it.
    What Will Happen:
    The potato will sink— but only halfway!
    Why?
    Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.
    The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down


    1.In the experiment, what should you do right after you pour the water over the spoon?


    1. A.
      Add the salt to the water
    2. B.
      Stir the salt into the water
    3. C.
      Place the potato in the jar
    4. D.
      Pour warm water into thejar

    2.In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?


    1. A.
      It is easier to see what you are doing
    2. B.
      It pushes the fresh water to the bottom
    3. C.
      It will keep the water from coming out
    4. D.
      It will keep the liquids from mixing together

    3.In which step of the experiment do you add the salt?


    1. A.
      Step 1
    2. B.
      Step 2
    3. C.
      Step 3
    4. D.
      Step 4

    4.What does the underlined word “gently” mean?


    1. A.
      Carefully
    2. B.
      Quickly
    3. C.
      Secretly
    4. D.
      Silently

    查看答案和解析>>

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