问题
填空题
- (A) 条件(1)充分，但条件(2)不充分．
- (B) 条件(2)充分，但条件(1)不充分．
- (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
- (D) 条件(1)充分，条件(2)也充分．
- (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
In the figure above, line segments JK and LM represent two positions of the same board leaning against the side KN of a wall. The length of KN is how much greater than the length of MN
(1) The length of LN is
meters.
(2) The length of JN is 1 meter.
答案
参考答案：D