Is xy > 0 ?
(1) x - y > -2
(2) x - 2y < -6
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
“画图法,(1)(2)分别代表两条直线某边的阴影,联立,则在第一象限,所以XY>0,选C”
登录 或 注册 后可以参加讨论