设有三个多项式，其系数向量分别为a、b、c，现在求它们的乘积，可以使用的命令有（ ）。 A: conv(a,b,c) B: conv(conv(c,b),a)) C: conv(a,conv(b,c)) D: conv(conv(a,b),c)

设有三个多项式，其系数向量分别为q、r、s，现在求它们的乘积，不能实现的命令有（）。 A: conv(q,r,s) B: conv(conv(q,r),s) C: conv(q,conv(r,s)) D: conv(conv(s,r),q)

设有三个多项式，其系数向量分别为q、r、s，现在求它们的乘积，可以使用的命令有（）。 A: conv（conv（q，r），s） B: conv（q，conv（r，s）） C: conv（conv（s，r），q） D: conv（q，r，s）

【单选题】s2和s3的乘积,则表达式为()。 A. s1*s2*s3 B. conv(s1,s2,s3) C. conv(conv(s1,s2),s3) D. conv(s1*s2*s3)

CONV指令能把一种数据类型转换成另一种数据类型。

CONV指令是转换指令,将整数转换为实数( )

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

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