So far as___interest is concerned, D/P at sight is more favorable than D/P after sight, and D/P is more favorable than D/ exporter's
B、the importer's
C、the consumer's
D、the government's

命令()表示多项式相乘

A.v
C：uv
D：conv(u,v)

点击查看答案

定义符号变量正确的为()。

A：symsxyz
B：x=symx
C：x=sym‘x’
D：symsx,y,z

点击查看答案