问题
选择题
The song Baby Sister ________ by Zeng Yike. [ ]
A. is written
B. writes
C. wrote
答案
答案：A
搜题请搜索小程序“爱下问搜题”
The song Baby Sister ________ by Zeng Yike. [ ]
A. is written
B. writes
C. wrote
答案：A
（xsin（1／x）-（1／x）sinx）的结果是：（）