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若22.05KHz的取样频率， 8位量化位数数字化某段声音，则采集 30秒，双声道声音所 需的存储空间大约是
A.0.6MB
B.1.3MB
C.2.6MB
D.10.1MB

A.05KHz的取样频率，
B.0.6MB
B.1.3MB
C.2.6MB
D.10.1MB
【参考答案】

B61-65

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Students enrolled at least half time may borrow up to $3，000 form. the government over a two-year perioD.Repayment of the loan begins six months after the student leaves school. These loans carry on interest until this timE.The current interest rate is 5 percent. Students may borrow up to $4，500 annually from a bank， credit union， savings and loan association or other eligible lender. Repayment on these loans usually begins six months after the student leaves school. These loans carry no interest until this timE.This current interest rate is 9 percent. Parents may borrow up to $300 annually for each dependent collegE.Repayment begins forty-five days after receiving the loan， and the interest rate is 12 percent.
61. Which of the following is the main purpose?
A.To remind students and their families to repay their loan
B.To compare interest rates
C.To inform students and parents of the various loans available
D.To show that government loans charge the least interest
If parents had three children in college how much could they borrow annually?A.900
B.3，000
C.300
D.9，000
It can be inferred from the passage that _______.A.the student‘s school determines who is an eligible lender
B.money is available for student loans
C.students need not be enrolled half time to borrow money
D.the interest rate on student loans is increasing
The highest interest rate is charged to _______.A.full-time students
B.parents
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D.half-time students
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请帮忙给出每个问题的正确答案和分析，谢谢！
不定项选择
期望假说理论假设长期债券和短期债券可以相互替代。‍
A．错误
B．正确
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