题目

What is the woman going to do this afternoon?A. Eat out. B. See a doctor. C. Go shopping. 答案：【答案】C【解析】此题为听力题，解析略。如图，C、D是线段AB上两点，若CB=4 cm，DB=7 cm，且D是AC的中点，则AC的长为  （    ）     A. 3 cm    B. 6 cm    C. 11 cm    D. 14 cm