题目

阅读短文，根据短文内容，简要回答下列问题。Have you ever taken traditional Chinese medicine? Do you like its taste? Some people dislike it because of its bitter (苦的）taste, but more and more people are becoming interested in traditional Chinese medicine for the reason that it’s an effective way to cure (治疗）illnesses. For example, if you have a sore throat, you could drink hot water with Gancao.Chinese people have been using traditional Chinese medicine for centuries. Before the western medicine appeared in China, Chinese doctors went to the mountains to pick he已知函数的最小正周期是，其图象向右平移个单位后得到的函数为奇函数.有下列结论：①函数的图象关于点对称；②函数的图象关于直线对称；③函数在上是减函数；④函数在上的值域为.其中正确结论的个数是（ ）A.1B.2C.3D.4