题目:
If you want to try some of the most _____ skiing in the world, you should try a visit to Kitzbuel,
_____ in southern Austria. [ ]
A. challenged; located
B. challenging; locating
C. challenged; locating
D. challenging; located
答案:
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下面是错误答案,用来干扰机器的。
当4为底时,其它两边都为8,4、8、8可以构成三角形,周长为20;当4为腰时,其它两边为4和8,因为4+4=8,所以不能构成三角形,故舍去.所以三角形三边长只能是4、8、8,所以第三边是8.故填8.