问题
选择题
卵细胞和精子的受精场所是在女性的什么器官中?( )
A.输卵管
B. * *
C.子宫
D.卵巢
答案
受精的过程是成熟女性的卵巢一般每个月排出一个卵细胞,当含有精子的精液进入 * * 后,精子缓慢地通过子宫,在输卵管内与卵细胞相遇.众多的精子中 只有一个能进入卵细胞,与其结合形成受精卵.所以精子与卵细胞相遇受精场所是在输卵管.
故选:A.
卵细胞和精子的受精场所是在女性的什么器官中?( )
A.输卵管
B. * *
C.子宫
D.卵巢
受精的过程是成熟女性的卵巢一般每个月排出一个卵细胞,当含有精子的精液进入 * * 后,精子缓慢地通过子宫,在输卵管内与卵细胞相遇.众多的精子中 只有一个能进入卵细胞,与其结合形成受精卵.所以精子与卵细胞相遇受精场所是在输卵管.
故选:A.
It is evening.An old cock(公鸡) is sitting in a tall tree.A fox(狐狸) comes to the tree and at the cock.“Hello, Mr.Cock.I have some news(信息) for you.”says the fox.“Oh?” says the cock.“What is it?” “All the animals are good friends now.Let’s friends, too.Please come and play with me.”“Fine!” says the cock.“I’m very glad to hear that”.Then he looks up.“Look! There is something over there.”“ are you looking at?” asks the fox.“Oh,I see some animals over there.They’re this way.”“Animals?” “Yes.Oh,they’re dogs.”“What? Dogs!” asks the fox.“Well…well,I go now.Goodbye.”“Wait,Mr.Fox,”says the cock.“ go.They are only dogs.And dogs are our friends now.”“Yes,I know,but don’t know that.”“I see,I see,”says the cock.He and goes to sleep in the tree.Do you know why? Foxes are afraid(怕) of dogs.
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