问题
选择题
—Do you know _______?
—At 8:00 a.m.[ ]
A.who to talk with
B. when to have a meeting
C. what to do next
D. where to go swimming
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—Do you know _______?
—At 8:00 a.m.[ ]
A.who to talk with
B. when to have a meeting
C. what to do next
D. where to go swimming
答案：B
所示该安全标志表示的意思是（）。