1. (2016九上·萧山期中) 听下面一段独白，回答下列四个小题。

生词提示：spin 旋转，liquid 液体， solid 固体  shell 壳

If two eggs, can you find out which is a boiled egg and which is the uncooked one?<br />Maybe you think it's difficult, because they both look the same, but there is an interesting<br />and easy experiment for us to find it out.<br />Before the experiment, make sure you have the following things.<br />Two plates, one boiled egg and one uncooked egg.<br />Put the two eggs on the two plates and start spinning them at the same time.<br />The egg that can spin for a long time is the uncooked egg.<br />Why can the uncooked egg spin longer?<br />Now we can do the second experiment.<br />Put the uncooked egg on the plate and make it spin.<br />Then touch it with your finger to stop the spinning.<br />Once the egg stops spinning, take your finger away at once.<br />What happened to the egg?<br />The shell of the egg actually stops spinning, but its inside is still spinning because it's<br />liquid.<br />On the other hand, the boiled egg can stop quickly because it's solid inside.<br />Now we can do the third experiment, which is the uncooked egg and which is the uncooked<br />egg.<br />Maybe you think it's difficult, because they both look the same, but there is an interesting<br />and easy experiment for us to find it out.<br />Before the experiment, make sure you have the following things.<br />Two eggs, one boiled egg and one uncooked egg.<br />Put the two eggs on the two plates and start spinning them at the same time.<br />The egg that can spin for a long time is the uncooked egg.<br />Why can the uncooked egg spin longer?<br />Now we can do the second experiment.<br />Put the uncooked egg on the plate and make it spin.<br />Then touch it with your finger to stop the spinning.<br />Once the egg stops spinning, take your finger away at once.<br />What happened to the egg?<br />The shell of the egg actually stops spinning, but its inside is still spinning because it's<br />liquid.<br />On the other hand, the boiled egg can stop quickly because it's solid inside.

1. （1） What do we need to do the experiment?

   A . B . C .
3. （2） From the first experiment we know that ________.

   A . both the two eggs stop spinning at the same time. B . the uncooked egg stops later.      C . the boiled egg stops later.
5. （3） What does the second experiment tell us?

   A . It tells us which egg is heavier. B . It tells us how to make the egg spin. C . It tells us why the uncooked egg can spin longer.
7. （4） What happened to the uncooked egg during the experiment?

   A . The shell and its inside stop spinning at the same time. B . The shell stops spinning first.    C . The egg's inside stops spinning first.