The storm did a great deal of material damage.（英译中)

‍‍Q: Why did Benjamin Franklin fly a kite in a storm？‍‍

A.To protect houses against lightning.

B.To test the effects of the lightning rod.

C.To find out the strength of silk for kites.

D.To prove that lightning is electricity.

l villages: several fishing boats were _____ and many houses collapsed.

A) wrecked B) spoiled C) torn D) injured

No one knows for sure just how old kites are。 In fact， they have been in use for centuries。 25 centuries ago， kites were well-known in China。 These first kites were probably made of wood。 They may even have been covered with silk， because silk were used a lot at that time。 Early kites were built for certain uses。 In ancient China， they will use to carry ropes to cross rivers。 Once across， the ropes were tear down and wooden bridges would hang for them。 Legend tells of one General who flew musical kites over the enemies’ camp。 The enemy fled， believing the sounds to be the warming voices of angels。 By the 15th century， many people flew kites in Europe。 Marco Polo may have brought the kite back from his visit to China。 The kite has been linked to great names and events。 For instance， Benjamin Franklin used kite to prove the lightening electricity。 He flew the kite in the storm。 He did this in order to draw lightening from the clouds。 He tied a metal key and a strip of silk to the kite line。 The silk ribbon would stop the lightening from passing through his body。 Benjamin’s idea was first laughed at。 But later on， it enlightened the invention of the lightening rod。 With such grand history， kite flying is short remain an entertaining and popular sport。

Question 16 to 18 are based on the passage you have just heard。

Question 16： What does the speaker say about kite？

Question 17： What did ancient Chinese use cats to do？

Question 18： Why did BF flied a kite in the storm？

A.钙RNI为600mg/d

B.维生素A的RNI为310μgREA/d

C.维生素D的RNI为20μgREA/d

D.铁RNI为9g/d

The whole world looks upon the rapid(economy). ______ development of our country as a great wonder.

A.Personal observation

B.Standardized tests

C.Statistical reports

D.Written reports

E.Word-of-mouth reports

A.After all

B.As a result

C.As a whole

D.As usual

考虑周期离散时间指数时间信号证明该信号的基波周期是其中gcd（m， N) 是m和N的最大公约数（grea

考虑周期离散时间指数时间信号

证明该信号的基波周期是

其中gcd(m， N) 是m和N的最大公约数(greatest common divisor) ， 也就是将m和N都能约成整数的最大整数，例如

注意：若m，N无公因子，则N­0=N0。

mall single-engined aeroplane.At midnight, several hours after she had left Newfoundland, she ran into bad weather.To make things worse, her altimeter (高度表) failed and she didn't know how high she was flying.At night, and in a storm, a pilot is in great difficulty without an altimeter.At times, her plane nearly plunged into the sea.

Just before dawn, there was further trouble.Amelia noticed flames coming from the engine.Would she be able to reach land？ There was nothing to do except to keep going and to hope.

In the end, Amelia Earhart did reach Ireland, and for the courage she had shown, she was warmly welcomed in England and Europe.When she returned to the United States, she was honored by President Hoover at a special dinner in the White House.From that time on, Amelia Earhart was famous.

What was so important about her flight？ Amelia Earhart was the first woman to fly the Atlantic Ocean alone, and she had set a record of fourteen hours and fifty-six minutes.

In the years that followed, Amelia Earhart made several flights across the United States, and on each occasion she set a new record for flying time.Amelia Earhart made these flights to show that women had a place in aviation and that air travel was useful.

(1).Her engine went wrong when Amelia Earhart was flying alone from North America to England.()

A.T B.F

(2).When Amelia Earhart saw flames coming from the engine, she changed her direction and landed in Ireland.()

A.T B.F

(3).According to the passage, Amelia Earhart's reason for making her flights was to show that aviation was not just for men.()

A.T B.F

(4).Amelia Earhart was the first woman who succeeded in flying across the Atlantic Ocean alone.()

A.T B.F

(5)."A Dangerous Flight from North America to England would be the best title for the passage.()

A.T B.F

A.TD

B.TS

C.STS

D.T