题目

如果三角形的一边长为m2＋n2，该边上的高为4m2n，那么这个三角形的面积为___. 答案：【答案】2m4n＋2m2n3【解析】试题分析：单项式乘以单项式，首先将系数进行相乘，然后根据同底数幂乘法计算法则进行计算得出答案．S=．根据短文内容，选择最佳答案。News ReviewHead-on Train Crash On May 18,two trains had a head-on crash （正面相撞） near New York City. Over 250 people were on the trains then. About 60 people were hurt, but no deaths were reported.Travel Time Tourists came together to Mount Tai on May 1.Over 180,000 tourists visited the place of great interest during the three-day holiday, from April 29 to May 1.Brave Volunteer Liao Zhi, a dance teacher from Chengdu who lost her 1-year-old daughter and her legs in the 2008 Wenchuan earthquake, arrived in Ya'an 13 hours after the earthquake. The dancer said she had had a terrible time herself and knew what people needed most, so she decided to come and offer help.Tomato CompetitionA tomato competition was held in Huainan, Anhui Province, on April 16.The best tomatoes were chosen according to their shape, color and taste. The competition hoped to encourage the farmers to grow better tomatoes.（1）About people were hurt in the head-on crash.A.18B.29C.60D.250（2）A lot of people visited Mount Tai .A.13 hours after the earthquakeB.on May 18C.during the May Day holidayD.on April 16（3）Zhi, the dance teacher from , came to Ya'an to offer help.A.HuainanB.ChengduC.TaishanD.New York（4）Liao Zhi lost her daughter and her legs .A.in Wenchuan earthquakeB.in Ya'an earthquakeC.when she took a trainD.when she climbed mountains（5）The tomato competition in Anhui Province was held to .A.help the people in Ya'anB.save the people on the trainsC.forget the terrible timeD.help grow better tomatoes