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An Experiment Materials: Newspaper, ‘ACE...

 

An Experiment

Materials: Newspaper, ‘ACE’ hardware ruler (1/8 “think”), a flat table.

Purposes: We’ll show that there is air pressure pushing on us, from every direction while we’re on this Earth.

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Procedure:

First put a thin ruler on a flat table with a little

less than half of it hanging off the edge of the table

(see the drawing below). Next place a sheet of newspaper

over the ruler flat against the table. Make sure to have

as little air as possible under the paper so that the fold line of the newspaper is at the ruler. Then quickly strike the end of the ruler hanging off the edge of the table. If you strike it quick enough, the ruler will break near the table edge.

What’s going on?

The Earth is covered in a layer of air that is nearly 80 miles thick and at sea level (the bottom) exerts or ‘pushes’ hard almost 15 pounds of pressure per square inch. That means that a full sheet of newspaper laid out flat has nearly 9,300 pounds of air above it.

When you break the ruler above, you are able to break it because of the 'heavy' air pushing down on the paper while you quickly strike the ruler. At first the table is pushing back on the paper, and if you move the ruler quick enough, other air around the edges of the paper can't get under the paper fast enough, so you are trying to lift that 9,300 pounds with the ruler! Some air gets under the paper, but not enough, so the ruler breaks.

1.By doing the experiment, we may realize         .

         A.that air exits everywhere

         B.why there are directions

         C.that we live with air pressure

         D.how air helps on the earth

2.How many steps are there in this experiment?          .

         A.2         B.3         C.4         D.5

3.The underlined word “exert” probably means       .

         A.cover completely                 B.advocate actively      

         C.influence gradually    D.press heavily

4.The ruler breaks under a quick strike mainly because of          .

         A.the air pressure on the newspaper  B.the heavy weight of the newspaper

         C.the heavy weight of the flat table     D.the strong power used on the ruler

 

 C  B  D  A 【解析】
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    On December 18, 1620, passengers on the British ship Mayflower came on shore at modern – day Plymouth, Massachusetts, to begin their new settlement, Plymouth Colony.

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On Septmeber 6,1620, one hundred and two passengers – called Pilgrims (朝圣者) by William Bradford, a passenger who would become the first governor of Plymouth Colony – crowded on the Mayflower to begin the long, hard journey to a new life in the New World. On November 11,1620, the Mayflower landed at Provincetown Harbor. Before going on shore, 41 male passengers – heads of families, single men and three male servants – signed the famous Mayflower contract, agreeing to form a government chosen by common election and to obey all laws made for the good of the colony.

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On April 5,1621, the Mayflower and its crew left Plymouth to return to England. Over the next several decades, more and more settlers made the voyage across the Atlantic to Plymouth, which gradually grew into a successful shipbuilding and fishing center.

1.A group of English were forced to leave their country in 1606 because          .

         A.their belief was different from the official Church

         B.they built their own churches in a foreign country

         C.they lacked financial support from the government

         D.they were ambitious to build the colony in America

2.How many days did the sea journey to Provincetown Harbor last?          .

         A.103    B.96       C.66       D.35

3.Several leading teams were sent in order to        .

         A.hunt for food for the passengers       B.control local Native Americans

         C.build a settlement for the passengers      D.explore the region for their settlement

4.From the passage we know that         between 1620 – 1621.

         A.52 Mayflower passengers died of some illnesses    

         B.Pilgrims had a good relationship with the locals

         C.Plymouth turned a main center for shipbuilding      

         D.Pilgrims tried to plant corns and beans in winter

 

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A lonely and sad pug (哈巴狗) was photographed as he waited for his owner by the side of the road has been considered as the world’s saddest dog. Pictures of the pet taken by a passer-by have become an internet foucus after being posted on the photo-sharing  website Flickr. The dog which is nicknamed Mr Newman looks terribly upset as he sits on the pavement tied to a lamp-post with a rope.

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1.The little pug waited by the road probably because           .

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第三部分:阅读理解(共20小题,每题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

Until quite recently, I knew only three things about my father: I knew his name, David S. Johnson, Jr. I knew he was an only child, and I’d been told he was killed on April 12, 1945, somewhere in Germany.

I used to come to visit my Granny. “Daddy David and his two friends were out in the fields, making sure the way was safe for the others to follow,” she told me. “All of a sudden there was an explosion. All three of them were killed.” Granny was looking down, stroking one thin hand with the other. Then there were no words but silence.

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I was born in January 1945. On February 15 my father wrote me a letter of welcome. The letter is kept in my baby book, “Dear Susan, you have a very good family. Your dad is sort of a less able person. Your mother is the most wonderful person I’ve ever known. I’ve always marveled at my great good fortune to have her and been loved by her. If you follow her words and examples, you may expect to meet life in the best possible way, and your path will always be the right one. Your father, Dave.”

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第二节 完型填空(共20小题;每小题1.5分,满分30分)

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Children and young people tend to have certain role models – people they want to be like when they grow   36  . Though   37   children would have wished to copy their mother, father or a (n)   38   relative, gradually these role models are thought of as famous people or popular   39  . People have different opinions about   40   popular stars or other famous people are good role models for children. Charming models, such as Katie Price, are often admired and   41   by young girls. This is the biggest worry of parents and teachers. They wish to   42   the concept that success is achieved through hard work and   43   rather than an attractive looking.

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37.A.at first        B.at last         C.at least      D.at most

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39.A.fans   B.stars  C.singers       D.dancers

40.A.that   B.why    C.whether     D.if

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         A.which          B.where         C.that   D.when

 

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