题目

如图，五边形ABCDE中有一正三角形ACD，若AB=DE，BC=AE，∠E=115°，则∠BAE的度数为何？（ ）A. 115 B. 120 C. 125 D. 130 答案：【答案】C【解析】根据全等三角形的判定和性质得出△ABC与△AED全等，进而得出∠B=∠E，利用多边形的内角和解答即可．∵三角形ACD为正三角形，∴AC=AD，∠ACD=∠ADC=∠CAD=60°，∵AB=DE，BC=AE，∴△ABC≌△DEA，∴∠B=∠E=115°，∠ACB=∠EAD，∠BAC=∠ADE，∴∠ACB+∠BAC=∠BAC+∠DAE=180°﹣115°=65°，∴∠BAE=∠BAC+∠DAE根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。There are world records at the Olympic Games. But what are the world records in the animal kingdom?The largest and heaviest animal on earth is the blue whale. _________Its heart is the size of a Mini Cooper. It’s got the biggest mouth in the world as well._________But it doesn’t eat people!In fact, the biggest thing it can eat is the size of an apple.The giraffe is smaller than the blue whale but it is also a record breaker. _________ It’s got the longest neck-about 2 metres long, and it’s got the longest legs-about 1.8 metres long. Drinking is difficult, but eating from the top of trees is easy! _____________The most dangerous animal in the world isn’t a lion or a bear. It’s an insect! The mosquitoes（蚊子）that carry malaria kill over 1million people a year. ___________ They kill 50,000 to 125,000 people a year．A. After that, the most dangerous animal is the venomous(分泌毒液的)snake．B. It’s the tallest living land animal．C. The snakes are not so dangerous as the mosquitoes.D. About 100 people can fit inside it．E. It can eat at least 100 people.F. It weighs between 110and 120tons．G. And its tongue is 50cm long!【1】________【2】________【3】________【4】________【5】________