函数（）用于从文本字符串中取出特定长度的字符。 A: MID B: COUNTIF C: ROUND D: RATE

以下参数传递正确的是： A: def score(mid_score, end_score): ……score(88, 79) B: def score( *，mid_score, end_score, mid_rate＝0.4): ……score(88, 79) C: def score( *，mid_score, end_score, mid_rate＝0.4): ……score(end_score = 79, mid_score = 88) D: def score( *，mid_score, end_score, mid_rate＝0.4): ……score(mid_score = 88, end_score = 79,0.5)

已知三阶矩阵$A$满足$\mid A-E\mid=\mid A-2E\mid=\mid A-3E\mid=0$，则$\mid A\mid$=( )。 A: $4$ B: $6$ C: $12$ D: $3$

设$A,B$是$n$阶正交矩阵，且$\mid A\mid=-\mid B\mid$，则( ). A: $A+B$可逆 B: $A+B$不可逆 C: $\mid A+B\mid=1$ D: $\mid A+B\mid=-1$

The relationship among real interest rate, nominal interest rate, and expected inflation rate is _________. A: real interest rate = nominal interest rate+ expected inflation rate B: real interest rate = nominal interest rate- expected inflation rate C: real interest rate = expected inflation rate - nominal interest rate D: nominal interest rate = real interest rate - expected inflation rate

Excel2010从18份身份证号中获取出生日期可以使用（）函数。 A: MID(A1,6,8) B: MID(A1,7,8) C: =MID(A1,6,8) D: =MID(A1,7,8)

中国大学MOOC: The relationship between the nominal rate of return, the real rate of return and the rate of inflation is(1 + nominal rate) = (1 + real rate)´ (1 + inflation rate).

The rate of return is also called the A: discount rate only. B: discount rate and hurdle rate only. C: discount rate, hurdle rate, and opportunity cost of capital. D: discount rate and opportunity cost of capital only.

The tax rate applicable to land value-added tax in China is（ ） A: Total cumulative tax rate B: Full rate progressive tax rate C: Excess amount progressive tax rate D: Excess rate progressive tax rate

船舶电台海上移动业务识别码的组成是( )。 A: MID X1X2X3X4X5X6 B: 0 MID X1X2X3X4X5 C: 00 MID X1X2X3X4 D: 00 MID X1X2X3X4X5