题目内容

According to the passage, who opened the outer world to Helen Keller?

Alexander Graham Bell
B. Anne Sullivan Macy
C. Mark Twain
D. Thomas Alva Edison

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I should call to me all my dear friends and look long into their faces, imprinting upon my mind tbe outward evidence of the beauty that is within them.此句中的imprinting意思是：

A. producing a mark on a surface
B. making an impression
C. having an influence
D. drawing pictures

I who am blind can give one hint to those who see--one admonition to those who would make full use of the gift of sight: Use your eyes as if tomorrow you would be striken blind,...此句中的admonition意思是：

A. advice or warning
B. favour
C. inquiry
D. requirement

Who, according to George Bush's address, requires Americans to do small things with great love?

A. Preisident Clinton
B. George Washington;
C. George Walker Bush
D. a saint

对移动通信而言，下列语音编码方式哪种最好（）

A. 波形编码
B. 参量编码
C. 混合编码
D. 信道编码