腰椎间盘疝可以形成椎间盘游离体，下列关于游离体的描述中，哪项错误（）

A.游离体与椎间盘可以在同一层面上

B.游离体可以在椎间盘以上或以下层面

C.游离体密度一般高于硬膜囊

D.游离体密度一般低于硬膜囊

E.游离体一般不增强

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

In what year was Edward born ？（）
(1) In 1988, Edward turned 17 years old.
(2) Edward’s sister Lisa, who is 14 months older than Edward, was born in 1970.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.