中毒型痢疾发病中,哪项毒素是主要的()
A.肠毒素
B.内毒素
C.外毒素
D.细胞毒素
E.溶血毒素
参考答案:B
—You were not listening;what troubled you?
—I my coming math exam.
A.am thinking about
B.was thinking about
C.had thought about
D.will think about
浆膜腔积液呈棕色,常见疾病是()。
A.结核
B.肿瘤
C.厌氧菌感染
D.曲霉菌感染
E.阿米巴脓肿破溃