问题
选择题
—What's wrong with your computer?
—It doesn't _______. [ ]
A. turn on
B. work
C. break
D. turn off
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—What's wrong with your computer?
—It doesn't _______. [ ]
A. turn on
B. work
C. break
D. turn off
答案：B
的P-P键数是0.6×6.02×1023