感染哪种寄生虫后可以引起皮炎（）
A.猪带绦虫
B.鞭虫
C.血吸虫
D.旋毛虫
E.钩虫
参考答案：E
---- Who(谁) are they?
---- __________.
A．They are my sister
B．She is my friend
C．They are my friends
D．He is my friends
血清钙正常值为
A．290～310mmol/LB．135～145mmol/LC．3.5～5.5mmol/LD．7.35～7.45mmol/LE．2.25～2.75mmol/L
