问题
选择题
—Is your mother tall?
—_____. [ ]
A. Yes, he is
B. Yes, he isn't
C. Yes, she is
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—Is your mother tall?
—_____. [ ]
A. Yes, he is
B. Yes, he isn't
C. Yes, she is
答案：C
)是一种紫外线吸收剂，其合成路线如下：
的说法中，正确的是______（填编号）。