问题 问答题

                                                             冰的体积变大还是变小?

       在物理小组活动的时候,小明提出了这样一个问题:“水在结冰的时候体积如何变化?”小刚立即做出了回答:“根据物体热胀冷缩的性质,水结冰时的体积当然是变小的。”但小红提出了相反的意见:“如果体积变小的话,那么冰的密度会变大,冰将会沉入水中。但事实上冰会浮在水面上,所以体积应变大。”

      到底谁对谁错呢?小刚提出了通过实验去解决这个问题,并提出了自己的实验方案:“在小药瓶中装满水,放到冰箱中使水完全凝固,然后看看冰面是下降了还是升高了,不就行了吗?”大家都赞同这个方法,于是他们立即动手实验。于是他们在小容器中装满水后放入冰箱让它结冰,结果发现冰面是向上凸起的。

    再请回答下列问题:

(1)从小明他们的实验中,可以得到什么结论?                                                                 。

(2)这个实验经历了:

A、猜想与假说;B、设计实验;C、归纳结论;D、进行实验;E、提出问题。

小明他们采取的步骤顺序是:___________________。(填字母)

(3)这种现象会产生什么危害?请举出一个例子即可: _____________________________               _。

答案

(1)水在凝固时结成冰后的体积将变大;

(2)E、A、B、D、C;

(3)如啤酒等饮料放入冰箱冷冻室可能引起炸瓶等危害。

完形填空

根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项,并在答题卡上将该项涂黑。选项中有两项为多余选项。

What Teenagers Can Do To Earn More Respect?

As teenagers continue to grow and develop into young adults, the transition(过渡) into adulthood has begun. With so many physical and emotional changes going on, certain manners are often forgotten and other adult traits are not yet accepted as a way of life.   小题1:  By doing the following things, you will earn more respect.

Contribute to the household

At the very least, clean up after yourself. As a teenager, you are old enough to clean up after yourself. When you make a mess, clean it up.   小题2: All chores (杂活) that you do help to reduce the load of the person who did them before. Now that you’re old enough and capable, why shouldn’t you contribute to the household?   小题3:   

Be responsible

  小题4: Whether they are basic things, like brushing your teeth or doing your homework, or more involved chores that contribute to the household, simply fulfill your responsibilities on time. When adults know that they can rely on you, their trust and respect for you will increase.

Solve more of your own problem without asking for help

Instead of taking the easy approach and asking for help, make an effort to solve your problems on your own first. The “easy way ” is only easy for you, but it is an extra task for the person from whom you are seeking help. Seek help only after you have made an honest effort to solve your own problems.  小题5:  When you become a good problem solver, you increase your valve to the community.

A.The people doing the chores before will greatly appreciate the help.

B.It will make your life more pleasant.

C.Everyone has certain responsibilities.

D.When speaking to a group, speak loud enough.E. This includes, but is not limited to, your dishes and your room.

F. By being aware of these manners and traits, you can manage them sooner.

G. Depending on the problem, 15 minutes of effort is usually a good guideline.

单项选择题