在招股说明书中，发行人应披露主要客户及供应商的资料，主要包括（）。 A.向前3名供应

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       In 1901, the citizens of Colorado Springs in the USA decided to collect everyday items and to

seal (封住)them in a special box. The box was marked "To be opened after midnight, December 31st,

AD 2000",and was kept in the Colorado College Library.

       One hundred years later, on the appointed (约定)day, 300 people gathered to watch the opening

of the box. Many in the crowd were the descendants (后代)of people who had placed things inside the

box.

       When the box was opened after midnight, the things inside the box were in very good condition.

There were newspapers, photos, diaries, name cards, family trees, books and lots of letters, including

one written by Theodore Roosevelt,  who became the President of the USA later that year.  One of

Roosevelt's friends lived in Colorado Springs at that time.

       Many of the letters were written to their descendants. They describe the hopes that the people of

1901 had for the people of the next century. At that time, Colorado Springs had just a few thousand

people. Now nearly half a million people live there.

       Colorado College Library has scanned the materials and put them on a website. Cecil Muller,

whose grandfather had placed a collection of postcards in the box, said that the time capsule was a

great treasure. "This is a wonderful educational resource(资源).  We can learn so much about our

history,"he said. "I never knew my grandfather, but now I feel very close to him. "

1. According to the passage, "time capsule" means ______.

A. a collection of clocks and watches

B. a machine for travelling through time

C. a collection of items for people to look at in the future

D. a collection of unwanted items

2. Many of the letters in the time capsule talked about.

A. the history of the town

B. the people who lived in the town  

C. the politics of the USA    

D. people's hopes for the future

3. Cecil Muller says that the time capsule ______.

A.helps him to get to know his grandfather

B. is worth a lot of money

C. brings back his memories of his grandfather

D. helps him to remember his younger day

Aften ten years' hard work, his dream has been _____.   [ ]

A. realized      

B. come true    

C. came true    

D. made true

次氯酸钠（NaClO）是某家用消毒剂的主要成分，其中氯元素的化合价是

A．-1

B．+1

C．+3

D．+5

最微镜镜头的数值孔径标准简写（）

A.AN

B.FN

C.ND

D.NA

E.NF

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