测量6kV变压器线圈绝缘电阻和吸收比,应用( )电压等级的兆欧表。
A.500V
B.1000V
C.2500V
D.5000V
参考答案:C
下列可用于治疗结核病的药物是()。
A.庆大霉素
B.链霉素
C.阿奇霉素
D.四环素
E.TMP
If an investment of $4 000 will grow to $ 6 520 in four years with monthly compounding, the effective annual interest rate will be closest to:()
A. 11.21%
B. 12. 28%
C. 12. 99%