三角形一边长为 ，另两边长是方程 的两实根，则这是一个（   ）.

当a=8，b=6时，2a+3b等于（        )

    Can you write down a Chinese word being read to you? Sometimes it can be difficult when you find the word is not included in most dictionaries.

    Lu Jialei, 14, from Hangzhou Foreign Language School, won the CCTV Chinese Character (汉字) Spelling Contest on Oct 18^th, 2013. About 160 people competed. The host read a word to the contestant, explained its meaning and gave sample sentences. The contestant was required to write down the word.

    Winning the contest was a “surprise” to Lu. “I was not the smartest one,” she said. “But I paid attention to details.” To prepare for the contest, she and her teammates studied the Modern Chinese Dictionary for 10 days. There are more than 56,000 entries (词条) including characters, words and phrases in it. She also had a secret weapon. She studied how Chinese characters were formed.

    “When others paid attention to the plot of a story, she looked at how authors use words and sentences to express themselves,” said Su Yunsheng, Lu's Chinese teacher. Su is happy to see students like Lu find the beauty of Chinese language.

    “Besides using something Chinese and having Chinese traditional festivals, learning to write Chinese characters is also an important part of inheriting (传承) Chinese culture,” said Su.

翻译下列句子。