胃食管反流病的特征性症状是（） A.进食后腹痛 B.饥饿时腹痛 C.反酸 D.胸骨后
题型：单项选择题 A1/A2型题
问题：
胃食管反流病的特征性症状是（）
A.进食后腹痛
B.饥饿时腹痛
C.反酸
D.胸骨后痛
E.吞咽困难
题型：单项选择题 A1/A2型题
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.
If a＞0 and b＞0, is 
？（）
(1) a=b-2
(2) [*]
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.