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【单选题】
以下关于信号概念的描述中,错误的是A.
传输介质与传输设备确定电信号的类型
B.
电平幅度连续变化的电信号称为模拟信号
C.
用脉冲信号不同的电平跳变来表示的电信号为数字信号
D.
模拟的语音信号不能够用于传输计算机网络中的二进制数字信号
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【简答题】主要原料是:DHA干粉、大豆磷脂、维生素E、枸杞子、桑椹,可以申报的保健功能为( )
【简答题】Listen to a passage and choose the best answer to each of the following questions. 1. What do Westerners think of the influence of puppy love on agers’ life? A. Harmful and unhealthy. B. Harmles...
【简答题】小题1:Why is June 6, 1990 a special day for Mommy? A．Her dream of being a mother came true. B．She found her origin from her Chinese mother. C．She wrote the letter to her daughter. D．Her female line was ...
【单选题】Which of the following is NOT true about the author s daughter?
A.
She went out without adult supervision.
B.
She knew where the little park was located.
C.
She visited her new neighbors and made some friends.
D.
She had more ideas about the surroundings than the author.
【单选题】I borrowed two books. One is in English, and _______ is in Chinese.
A.
another
B.
other
C.
the other
【单选题】Which of the following is NOT true?
A.
a. Eleanor and Corinne are sisters.
B.
b. Nanny and Barbara are grandmother and granddaughter.
C.
c. Barbara and Corinne are mother and daughter.
D.
d. Nanny and Corinne are grandmother and granddaughter.
【单选题】Read the excerpt from the poem "Sonnet - To Science" by Edgar Allan Poe: "Science! true daughter of Old Time thou art! Who alterest all things with thy peering eyes. Why preyest thou thus upon the poe...
A.
The poet harbors a nostalgic feeling to science as the daughter of Old Time.
B.
Scicence is animalized as a predator, dull in the sense of being un-poetic.
C.
Science has altered everything and it is a sign of progress.
D.
The poet possesses a mixed feeling towards science.
【单选题】Which of the following is NOT true?
A.
． Obama’s father was born in Kenya.
B.
． Obama has a son and a daughter.
C.
． Obama once worked in Africa.
D.
． Obama got good education in Harvard University.
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