题目内容

The nominal interest rate is

A. the interest rate paid or charged by a bank.
B. the interest rate as usually reported without a correction for the effects of inflation.
C. both a and b above.
D. None of the above is correct.

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When Georgie died he left $5,000 to be invested for a period of 200 years to benefit medical students and scientific research. According to the “rule of 70,” how often would this money have doubled if it grew 7 percent per year every year?

A. about every 10 years
B. about every 7 years
C. about every 5 years
D. about every 3.5 years

ULN2803内部具有一个（）路NPN达林顿晶体管阵列，适合作为TTL、CMOS、NMOS或PMOS等低逻辑电平数字电路与继电器、步进电动机等直流高电压、大电流设备之间的接口

A. 24
B. 16
C. 8
D. 32

ULN2803引脚1~8为8路（），引脚11~18为8路输出。

A. 输入
B. 输出
C. 地
D. 电源

ULN2803引脚1~8为8路输入，引脚9为（），引脚10为公共端。

A. 地
B. 电源
C. 数据线
D. 控制线