题干

满足下列条件的三角形中,不是直角三角形的是(   )

A:三内角之比为1:2:3

B:三边长分别为5,12,14

C:三边长之比为3:4:5

D:三边长分别为1, 2 , 3

上一题 下一题 0.0难度 选择题 更新时间:2019-02-23 11:36:14

答案(点此获取答案解析)

B

同类题5

欣赏下面一首现代诗,回答小题。

瀑布

洪 源

                                                                                                   要下山!要出谷!

                                                                                                   一声呐喊,

                                                                                                   从云崖上扑下,

                                                                                                   哪怕它粉身碎骨!

                                                                                                   向往的是——浩浩江河、茫茫大海,

                                                                                                   想念的是——展翼的风帆、击浪的桡橹,

                                                                                                   啊,全凭一腔燃烧的信念,

                                                                                                   脚下,才开辟出一条奔腾的生命之路。

(节选自《中国当代名诗一百首》)