如图所示，OD是∠BOC的平分线，OE是∠AOC的平分线，找出图中互补的角、互余的角．

人体中缺乏某种微量元素时，会引起甲状腺肿大，该元素是（   ）

下图是某高等动物细胞内通过一系列酶将原料合成它所需要的氨基酸C，该氨基酸是细胞正常生活所必需的，而食物中又没有。下列说法正确的是（   ）

阅读下面短文。从短文后各题所给的四个选项A、B、C、D中，选出可以填入空白处的最佳选项。    Once there lived two brothers. The elder was called Simon and the younger Victor. They 1 each other very much, and always took care of one another. Every day they worked from morning 2 night, getting as much grain(谷物) as possible from their fields.
    One late autumn evening, after their work in the 3 was done, Simon said to his wife, "Victor got married last month. He has many bills(账单) to pay. I think I will put a bag of rice in his barn(谷仓). "Oh, that's a good idea," said his wife. "But please don't tell him," said Simon, "If he knows I put the rice there, he will 4 take it."
    So, late that night Simon took a bag of rice to Victor's barn. The next day, while looking at his own barn, he found 5 strange. "I took a bag of rice to Victor's house last night, 6 I still have the same number of bags in my barn. 7 did that happen?"
    Simon decided to take another bag of rice to his brother's barn that night. But the next morning, he found the 8 number of bags in his barn again! "This is very strange," he thought. That night he 9 again. He carried a large bag of rice on his shoulder(肩膀); and walked down the road to his younger brother's house. In the bright moonlight, he could see another 10 coming down the road. He was carrying something on his 11, too. "Younger Brother!" Simon cried, "What are you doing?" "I was 12 you, Older Brother," said Victor, "Your family is 13 than mine. I thought you needed more rice." The two brothers quickly 14 that they had been taking rice to each other. They 15 what had happened. "It is good to have a brother like you," they both said. And they lived happily ever after.

小明同学在今年暑假期间和父母一起到法国去旅游，在法国的博物馆看到了这样一个文献――《Declaration of the Rights of Man and the Citizen》，它是法国大革命时期最著名的文献(  )