问题
单项选择题 A1型题
下列选项中，来自神经外胚叶的组织不包括（）。
A.虹膜上皮
B.瞳孔开大肌
C.视网膜色素上皮
D.视网膜中央血管
E.视神经
答案
参考答案：D
解析：虹膜上皮、瞳孔开大肌、视网膜色素上皮、视神经组织来源为神经外胚叶，视网膜中央血管组织来源为轴旁中胚叶。
搜题请搜索小程序“爱下问搜题”
下列选项中，来自神经外胚叶的组织不包括（）。
A.虹膜上皮
B.瞳孔开大肌
C.视网膜色素上皮
D.视网膜中央血管
E.视神经
参考答案：D
解析：虹膜上皮、瞳孔开大肌、视网膜色素上皮、视神经组织来源为神经外胚叶，视网膜中央血管组织来源为轴旁中胚叶。
On a cold afternoon in winter, Robert was walking on the bridge. There was hardly any 1 on the river. Near the bridge, however, there was a small canoe(独木舟), with a boy in it. He was not 2 many clothes. He was going to walk when he heard a cry, “Help!” He looked down and saw the boy was in water and his canoe was far away. Robert was a good 3 . Taking off his clothes, he jumped into the river. The cold water made him tremble(颤抖)all over. Soon he 4 the boy and started to swim towards the river bank. Just then he saw a motor boat under the bridge. There were some people on it, all 5 in his direction. Robert 6 to swim towards the boat. “Help me,” he shouted 7 he got near the boat. He looked up into a row of faces. “Why?” he thought. “They look so 8 .” Silently they helped the boy into the boat. But they did not move to save Robert. “Aren’t you going to help me 9 , too?” Robert asked. “You!” said one of the men, who was standing next to a large camera, “Why, we were making a film and you spoiled (搅乱) the whole afternoon’s work! You can 10 in the water.”
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