Recently, Mr. Johnson, together with five other men, __________ one of the lifeboats, and sailed

800 miles to the island, where there is a lake with rich fresh water.[ ]

A. have been to

B. has been to

C. has taken

D. have taken

哪种类型的过敏性紫癜可用抗凝疗法（）

A.皮肤型

B.腹型

C.关节型

D.肾型

E.以上都不是