题目

如图，AB是⊙O的直径，∠ACD=15°，则∠BAD的度数为（ ）A．15° B．30° C．60° D．75° 答案：【答案】D【解析】试题分析：由AB是圆的直径，则∠ADB=90°，由圆周角定理知，∠ABD=∠ACD=15°，即可求∠BAD=90°﹣∠B=75°．解：连接BD，∵AB是圆的直径，∴∠ADB=90°，∴∠ABD=∠ACD=15°，∴∠BAD=90°﹣∠ABD=75°．故选：D． Tom did not take away the camera because it was just the same camera ____ he lost last week. A. which            B. that             C. whom            D. as