题目

阅读理解My daughter was beingthrown out of the sixth grade. The teacher said, She may not be up towhat we're trying to accomplish. He was really saying she didn't have theintelligence. I got mad because I knew she was smart, just as my father hadknown I was smart when I was failing in school. We had her tested. I decided toget myself tested as well, and found that the troubles she was having wereexactly what I had had — dyslexia. By then I was a successful televisionwriter, and had won an Emmy Award for TheRockford Files.If I had known earlier thatsomething beyond my control could explai．（本小题满分14分）已知矩形所在平面，，为线段上一点，为线段 的中点．（1）当E为PD的中点时，求证：；（2）当时，求证：BG//平面AEC．