题干
Shall we______our discussion and have some tea or coffee, please?
A：break out
B：break dow
C：break into
D：break off
答案(点此获取答案解析）
D
A：break out
B：break dow
C：break into
D：break off
⊥平面
内所有直线”的充要条件是“
”的必要不充分条件是“