某工地工人在施工过程中不慎被钢筋刺破胸壁。
该损伤的类型为（）。
A.挫裂伤
B.挤压伤
C.扭伤
D.开放性损伤
E.闭合性损伤
参考答案：D
Father together with his good friends was________to go out for a camp________it began to rain. [ ]
A. hardly; than
B. around; as
C. about; when
D. nearly; while
简述反渗透的原理？
