以下是糖酵解过程中的几个反应，其中（）是可逆的反应。 A.磷酸烯醇式丙酮酸——丙酮酸
题型：单项选择题
问题：
以下是糖酵解过程中的几个反应，其中（）是可逆的反应。
A.磷酸烯醇式丙酮酸——丙酮酸
B.6-磷酸果糖——1，6—二磷酸果糖
C.葡萄糖——6—磷酸葡萄糖
D.1，3—二磷酸甘油酸——3—磷酸甘油酸
题型：单项选择题
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 each of the segments marked on the board above is of equal length, and if x and y represent the indicated lines on the board, then what is the distance between x and y ？（） (There are twelve inches in a foot).
(1) The board is five feet long.
(2) x is 18 inches from the nearest end of the board.
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.