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听力原文： Once a thief stole a bag of corn from a farmer's house. The farmer went to the judge and told him about this. The judge ordered all the people of the farm to come before him. He took many sticks of equal length and gave one stick to each man. He then said, 'Come before me again tomorrow. I shall know which of you is the thief because the thief's stick will be one inch longer than any of the others. 'The thief was afraid of the judge's words, and so cut an inch off his stick. The next day, people saw the thief's stick was one inch shorter than any of the others. In this way the thief was found out, and was at once taken to prison. What did the thief steal?A.
A bag of rice.
B.
A bag of corn.
C.
A stick.
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【简答题】对于椭圆 x 2 a 2 + y 2 b 2 =1(a＞b＞0，c= a 2 - b 2 ) ，定义 e= c a 为椭圆的离心率，椭圆离心率的取值范围是e∈（0，1），离心率越大椭圆越“扁”，离心率越小则椭圆越“圆”．若两椭圆的离心率相等，我们称两椭圆相似．已知椭圆 x 2 4 + y 2 m =1 与椭圆 x 2 m + y 2 9 =1 相似，则m的值为______．
【单选题】下列关于计算机发现史的叙述中错误的是( )
A.
世界上第一台电于计算机是在是美国发明的ENIAC
B.
ENIAC 不是存储程序控制的计算栈
C.
ENIAC是1946年发明的，所以世界双1946年起就开始了计算机时代
D.
世界上第一台投入通行的具有存储程序控制的计算机是英国人设计并制造的EDSAC
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