题目

The suggestion ________ by the teacher is available. A. put forward        B. putted forward           C. putting forward       D. put on 答案：A将一个含30°角的直角三角尺，∠AMF=90°，如图所示放置在矩形纸板上，已知矩形纸板的长是宽的2倍，点M是BC边的中点，则∠AFE的度数为_____．