题干

下列四幅图描述的现象中,为了增大压强的是

A:坦克装有宽大的履带                 

B:书包带做得较宽

C:斧刃磨得很锋利                    

D:在铁轨下面铺枕木

上一题 下一题 0.0难度 选择题 更新时间:2017-10-28 09:08:09

答案(点此获取答案解析)

C

同类题1

阅读下列短文,根据短文内容填写表格,每空限填一词。

     Travelling is one of the most important activities and people have been interested in it for many years. Modern traffic develops fast, so travelling to different places has become much faster than before. Staying healthy while travelling can make your trip happier. But do you know how to keep healthy during a trip? The following information may be useful to you.

Before leaving

    ●Wear comfortable shoes, a hat and sunglasses.

     ●Take some necessary medicine with you. They can be used when you get sick or have other problems.

     ●Do some exercise for weeks or months before you leave if you plan to do lots of walking or climbing during your trip.

    ● Prepare proper food. Before you prepare the food, the first thing you need to think about is how long you will travel with the food. If you take a long trip, you should bring food such as bread, biscuits and some fruit. They don’t go bad quickly. The nearer people can bring meat, fish, eggs, milk and even salads and vegetables.

While travelling   

     ●Be sure not to eat dirty food or bad fruit.

     ●Have enough time to take a rest during your trip.

     ●Tap water is not safe, so drink bottled water and always clean the cover of the bottle.

     ●Keep food in good condition. If you take hot food, you should try to keep it hot. For example, you can put it in heavy towels. If you need to keep cold food cold, you can put cold food in a box with ice. When you arrive, put cold food in the fridge. Remember: If you travel with food, keep hot food hot and cold food cold.       

                   How to keep ____ during a trip

Before leaving

● Wear comfortable shoes, a hat and ____.

●____ some necessary medicine with you.

● Exercise for weeks or months ____ you leave.

● Prepare proper food. Take bread, biscuits and some fruit for a ____ trip or bring meat, fish, eggs, milk and even salads and vegetables for a nearer one.

While

____

●____ eat dirty food or bad fruit.

● Have enough ____ to take a rest during your trip.

● Drink ____ water and always clean the cover.

● Keep food in good condition. ____ to keep hot food hot and cold food cold.

同类题2

阅读理解

    My best friend Jenny and I got to the mall for shopping.She held up a white sweater and matching skirt.“Do you like this?”she asked.

    “It's great,''I said.Jenny nodded and continued looking while I moved about.touching the beautiful clothes.“ I'll try this on.”Jenny walked towards the dressing room.After a while,she came out in the outfit(一套衣服).She looked beautiful.

    I sighed. Part of me wanted to say how good she looked, but another part stopped the words coming out.Jenny was in such good shape that she'd look good in the outfit.Sometimes, I regretted choosing a best friend who was so pretty.God,why can't I be the one with the rich parents and the great look?More and more, I was envious(妒忌的)of her.

    “Well,Teresa,what do you think?”Jenny asked more than once.“Do you like it?''

    The outfit looked great on her,but I lied,“Not really.I think you need something with more colors.''

    “You think so?"Jenny said doubtfully.

    “Just believe me.We'll find something better,"I told her,pushing her back into the dressing room.“You just can't buy the first thing you see.”I did my best to get Jenny out of the store,away from that outfit.As we left,Jenny gave the sweater one last look.

    Just down the mall,we passed a yogurt place."My treat,''Jenny said,pulling out her wallet.

    I could never say no to chocolate,so we got some and sat down at a table.As Jenny talked without stopping about a million things,I thought about my feelings toward her.Those feelings weren't kind.

    Sitting there,  ▲  Jenny was attractive(吸引人的)not just because of her good luck,but more because of her kindness.Treating me to chocolate was far from her only show of generosity.She also let me drive her car and borrow her colothes.

    Finishing our chocolate,we headed for the next clothing store. "Look at that red sweater.''Jenny said as we passed the window."It would be perfect for you.Soon maybe you'll have enough by saving your babysitting money to buy something like that.”

    A few minutes earlier,all I had heard was about saving my babysitting money.I had hated the fact that Jenny could ask her parents for anything,and they'd buy it for her.This time,though.I heard more.I heard the voice of someone who loved and cared me for who I was.I needed to express the same to her.