(37~39)
Erica, Grace, Ted and Sam are friends. They have somedifferent aches. For example, Erica always has a toothache. Samoften has a backache. According to (根據)the frequency(頻率) oftheir aches, answer the following questions.

【sunrisejen】評論
表格上的T應該代表toothache(牙★)...