问题
单项选择题 A1型题
关于胎盘功能的描述，不正确的是（）。
A.物质代谢
B.气体交换
C.分泌雌、孕激素
D.分泌人绒毛膜促性腺激素
E.胎盘激素主要是由细胞滋养层细胞分泌的
答案
参考答案：E
解析：胎盘激素主要是由合体滋养层细胞分泌的，而不是由细胞滋养层分泌的。
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关于胎盘功能的描述，不正确的是（）。
A.物质代谢
B.气体交换
C.分泌雌、孕激素
D.分泌人绒毛膜促性腺激素
E.胎盘激素主要是由细胞滋养层细胞分泌的
参考答案：E
解析：胎盘激素主要是由合体滋养层细胞分泌的，而不是由细胞滋养层分泌的。
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| Today is the last Saturday before Christmas. Everyone in the USA 1 shopping for presents. 2 is falling. People are walking fast.They are trying to keep 3 as they move from shop to shop. In the shops children are 4 at the toys. They are talking to a man called Father Christmas. He asks "What do you want for Christmas?" In the USA it is warm and beautiful in summer. The trees and fields are green then. But now it is winter and 6 is white. At 6 there are different colours. Small lights make the houses and builings 7 . Christmas is a beautiful 8 of a year. Christmas Day always begins before 9 . Children wake up very early. They open the 10 from their parents. Then they wake up their parents, saying "Merry Christmas." |
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