问题
选择题
— _____ that the art room?
— No, _____. [ ]
A. Is; is isn’t.
B. Is; it isn't.
C. Do; it is
答案
答案：B
搜题请搜索小程序“爱下问搜题”
— _____ that the art room?
— No, _____. [ ]
A. Is; is isn’t.
B. Is; it isn't.
C. Do; it is
答案：B
Al(OH)3+3H+