GWD TN 10-22

kaipiggy · 发表于 2010-8-22 19:00:27

Lines m and n intersect, as shown in the figure above.What is the value of u - w?
(1)u = 90
(2)Lines m and n are perpendicular.

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.
Answer: d

想问下这个题是什么意思？

tracytrace · 发表于 2010-8-22 19:03:31

选D啊
两条线相交啊,U+W等于180.所以任意条件都能推出u-w等于0咯

selinamba · 发表于 2010-8-22 19:03:48

U的角度减去W的角度

kaipiggy · 发表于 2010-8-23 16:28:48

哦，上面的圈圈原来表示度数呀。。。谢谢了！

GWD TN 10-22

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