能发泡止痛,攻毒杀虫的药物是()
A.马钱子
B.硫黄
C.炉甘石
D.毛茛
E.猫爪草
参考答案:D
It is _______ of the students to stay up reading till late night before the final exam.
A.common
B.typical
C.normal
D.regular
细菌性痢疾病理改变最严重的部位是
A.盲肠
B.回肠末端
C.直肠和乙状结肠
D.升结肠
E.降结肠