题目

如图，已知AB∥CD，∠A=36º，∠C=120º，求∠F-∠E的大小.  答案：24° 解析:解 过E作EG∥AB，过F作FH∥AB                                                ∴ ∠A=∠1   EG∥FH      ∵ ∠A=360  ∴ ∠1=360      ∵ AB∥CD  FH∥AB ∴ FH∥CD∴ ∠C+∠4=1800∵ ∠C=120º   ∴ ∠4=60º∵ EG∥FH   ∴ ∠2=∠3∴ ∠CFE-∠AEF== The American people will never forget the 9.11 event and the psychological trauma __________ caused to hundreds of thousands of common households.A．that B．it C．which D．what