How many are there in your school? [ ]
A. classes
B. class
C. classing
答案：A
下述是由沙门菌感染引起的疾病是（）
A.伤寒
B.斑疹伤寒
C.脑膜炎
D.肺炎
E.炭疽
萍水相逢píng shuǐ xiüng fãng
