下列关于MR检查乳腺病变作用中，哪项描述是错误的（）

A．能显示病变的形态和大小 

B．显示病变与周围结构关系 

C．对深层组织的侵犯程度 

D．增强扫描有助于良恶性病变鉴别和明确病变实际大小 

E．能显示病变中微小钙化 

Which device provides the main means in the GMDSS for locating ships in distress or their survival craft（）.

A.Radio direction finder

B.Satellite EPIRBs

C.MF/HF DSC

D.VHF homing device