The student said to me, "She has made a close study of the problem."

The student told me that she __ a close study of the problem. [ ]

A. has make          

B. have made

C. had make          

D. had made

关于尿崩症下列错误的是（）

A.由抗利尿激素缺乏引起的称中枢性尿崩症

B.仅见于青少年、男性多于女性

C.以烦渴、多尿、低比重尿、低渗尿为特点

D.分中枢性尿崩症及肾性尿崩症两种

E.起病隐袭，常有原发病的表现