问题
单项选择题 A1型题
因致畸因子影响，面部突起联合失败，导致面部畸形的时间是胚胎（）
A．第6周和第7周
B．第8周和第9周
C．第10周和第11周
D．第12周和第13周
E．第14周和第15周
答案
参考答案：A
解析：
在胚胎第六周至第七周时，面部各突起如未能正常联合，则形成面部发育异常。故答案为A。
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因致畸因子影响，面部突起联合失败，导致面部畸形的时间是胚胎（）
A．第6周和第7周
B．第8周和第9周
C．第10周和第11周
D．第12周和第13周
E．第14周和第15周
参考答案：A
解析：
在胚胎第六周至第七周时，面部各突起如未能正常联合，则形成面部发育异常。故答案为A。
Mike always loves ships. When he was older, he said, "I' m going to be a soldier. " But his eyes were not very 1 , and he did not get in. Then he said, "I' m going to 2 a small boat and I' m going around the world. " But boats were very expensive, and Mike did not have enough 3 Last summer Mike found a swimming 4 near his house. The lessons did not cost very 5 , and Mike began going to the school at every end of the week and having 6 . Now he is a good swimmer. Last week a little boy said to him, " You' re a very good swimmer. How do 7 learn to swim so well?" "I'm not good at all," Mike said and he smiled." 8 in the water, I say to myself, there are 9 fishes behind me! Then I' m very afraid, and I 10 quickly. "
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