挑战习题
1/5单选题
难度:

1.

一直线l与其外三点ABC可确定的平面个数是(  )


A

1个

B

3个

C

1个或3个

D

1个或3个或4个

提示1:
PHA+5YiG5oOF5Ya16K6o6K66PC9wPg==
提示2:
PHA+5LiJ54K55YWx57q/5LiO5ZCmPC9wPg==
提示3:
PHA+6Iul5LiJ54K55YWx57q/77yM5YaN6K6o6K665LiO55u057q/PGk+bDwvaT7lvILpnaLkuI7lkKY8L3A+
正确答案:RA==
PHA+6Kej5p6Q77ya5b2TPGk+QTwvaT7vvIw8aT5CPC9pPu+8jDxpPkM8L2k+5YWx57q/5LiU5LiOPHNwYW4gY2xhc3M9Im1hdGhxdWlsbC1yZW5kZXJlZC1tYXRoIiBzdHlsZT0iZm9udC1zaXplOjIwcHg7Ij48c3BhbiBjbGFzcz0idGV4dGFyZWEiPjx0ZXh0YXJlYSBkYXRhLWNrZS1lZGl0YWJsZT0iMSIgY29udGVudGVkaXRhYmxlPSJmYWxzZSI+PC90ZXh0YXJlYT48L3NwYW4+PHZhciBtYXRocXVpbGwtY29tbWFuZC1pZD0iNCI+bDwvdmFyPjwvc3Bhbj48c3Bhbj4mbmJzcDs8L3NwYW4+5bmz6KGM5oiW55u45Lqk5pe277yM56Gu5a6a5LiA5Liq5bmz6Z2i77yb5b2TPGk+QTwvaT7vvIw8aT5CPC9pPu+8jDxpPkM8L2k+5YWx57q/5LiU5LiOPHNwYW4gY2xhc3M9Im1hdGhxdWlsbC1yZW5kZXJlZC1tYXRoIiBzdHlsZT0iZm9udC1zaXplOjIwcHg7Ij48c3BhbiBjbGFzcz0idGV4dGFyZWEiPjx0ZXh0YXJlYSBkYXRhLWNrZS1lZGl0YWJsZT0iMSIgY29udGVudGVkaXRhYmxlPSJmYWxzZSI+PC90ZXh0YXJlYT48L3NwYW4+PHZhciBtYXRocXVpbGwtY29tbWFuZC1pZD0iNCI+bDwvdmFyPjwvc3Bhbj48c3Bhbj4mbmJzcDs8L3NwYW4+5byC6Z2i5pe277yM5Y+v56Gu5a6aM+S4quW5s+mdou+8m+W9kzxpPkE8L2k+77yMPGk+QjwvaT7vvIw8aT5DPC9pPuS4ieeCueS4jeWFsee6v+aXtu+8jOWPr+ehruWumjTkuKrlubPpnaLvvI48YnI+PC9wPg==