问题
排序题
—Your sweater looks nice. Is it _____ wool?
—Yes, it is.[ ]
A. made of
B. made in
C. made for
D. made from
答案
答案：A
搜题请搜索小程序“爱下问搜题”
—Your sweater looks nice. Is it _____ wool?
—Yes, it is.[ ]
A. made of
B. made in
C. made for
D. made from
答案：A
展开成傅里叶级数时，该级数在x=0处的值为()。