8个二进制位至多可以表示（）个数据。

A．A person who is willing to help Mr. and Mrs. Smith make money.B．A person who is licensed to buy and sell stock on the stock market.C．A person who is familiar with stock market and all the companies.D．A person who is the instructor on the stock market.

A.A
B.
B．A
C.
C．A
D.
D．A
E.

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构成运算器需要多个部件，（）不是构成运算器的部件。

A.加法器
B.累加器
C.地址寄存器
D.ALU（算术逻辑部件）

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