题干
–What is the theme about for the meeting this evening?.
--No idea. Perhaps we will have to discuss the plan ___ a few days later.
--No idea. Perhaps we will have to discuss the plan ___ a few days later.
A：carried out
B：being carried out
C：to be carried out
D：carrying out
答案(点此获取答案解析）
C
是两条不同的直线，
是两个不同的平面，下列命题中正确的是（ ）
，则
的值为 （ ）
,那么集合
为 ( )