Life insurance, before available only to young, healthy persons, can now be obtained for old people, and even for pets.

A．before young, healthy persons available only,

B．available only to young, healthy persons before,

C．available only to persons young, but more healthy,

D．before young and healthy persons only available to,

下列MRI检查中哪些应用了水成像技术（）

A.MR胰胆管造影

B.MR脊髓造影

C.MR尿路造影

D.MR内耳造影

E.MR血管造影