我国古代著名的史学家司马光生活在[ ]
A、南朝
B、北宋
C、南宋
D、元朝
答案：B
Fever is a _____ of many illnesses. So I suggest you take it seriously and see a doctor
as soon as possible. [ ]
A. message
B. symptom
C. label
D. clue
人力装煤应遵守什么规定？
