Unmeasured quality change is a problem in the CPI because
A. if the quality of a good deteriorates, the purchasing power of a dollar increases even if the price of the good remains the same.
B. the Bureau of Labor Statistics does not attempt to account for any quality changes that affect the standard of living.
C. if the quality of a good improves, the purchasing power of a dollar increases even if the price of the good remains the same.
D. Both a and b are correct.
查看答案
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.
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
微信支付 
支付宝支付