下列关于肾囊肿的描述，不正确的是（）

A.平片可以明确诊断

B.尿路造影可见到肾盏受压拉长、分开或变形，但边缘光滑

C.CT平扫为低密度灶，边界清，增强后无强化

D.MRI平扫，T₁加权像为低信号，T₂加权像也为低信号

E.肾动脉造影可见到肾动脉受压、移位和拉直

One of the functions of the (71) is to store the applications programs or the various secondaries. The (72) may have similar or dissimilar functions. The same control code received from two different, secondaries may warrant two different actions on the part of the host computer. If the system so requires, the host computer must also provide (73) for the centralized data and the software for database management. Data information is normally stored in auxiliary memories to which the computer has ready access. The (74) peripherals connected to the host computer allow for human entry and intervention. As needs change, application programs may require additions, deletions, or changes. Data link problems also arise which are (75) the range of the computer’s programmed capabilities. In such cases, human entry is required to make the necessary changes to resolve the existing problems.

A．storage

B．data

C．range

D．link