题目

如图，四边形ABCD和ADPQ均为正方形，它们所在的平面互相垂直，则异面直线AP与BD所成的角为( ) A．B． 答案：C．如图，将原图补成正方体ABCD­QGHP，连接AG，GP，则GP∥BD，所以∠APG为异面直线AP与BD所成的角， 在△AGP中，AG＝GP＝AP， 所以∠APG＝．听短文并补充完整。     James Naismith was Canadian. He invented basketball in (1)______. At that time, He was a (2)______ teacher at Springfield college in the (3)______ Do you know how to (4)______ in the game? Well, just put the ball into the other side's (5)______.