某动物的高☆考♂资♀源€网一个精子细胞核中的DNA 含量为l5，那么该动物的一个正常体细胞中的DNA 含量和初级精母细胞中的DNA 含量依次是（）_刷题宝

题干

某动物的高☆考♂资♀源€网一个精子细胞核中的DNA 含量为l5，那么该动物的一个正常体细胞中的DNA 含量和初级精母细胞中的DNA 含量依次是（）

A：15，30

B：30，60

C：45，90

D：60，120

上一题下一题 0.0难度选择题更新时间:2018-10-04 06:37:52

答案(点此获取答案解析）

B

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下列生物不能作为生物武器的是

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根据题意填空

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某反应过程中体系的能量变化如图所示，

，下列说法错误的是（）

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The law which was passed last month applies to theatres, cinemas, and other places of public____(entertain)

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阅读与回答问题。

One morning a fox sees a cock. He thinks, “This is my breakfast.”

He comes up to the cock and says, “I know you can sing very well. Can you sing for me?” The cock is glad. He closes his eyes and begins to sing. The fox sees that and catches him in his mouth and carries him away.

The people in the field(田) see the fox. They cry, “Look, look! The fox is carrying the cock away.” The cock says to the fox, “Mr. Fox, do you understand? The people say you are carrying their cock away. Tell them it is yours. Not theirs.”

The fox opens his mouth and says, “The cock is mine, not yours.” Just then the cock runs away from the fox and flies into the tree.

回答下面5个问题, 每题答案不超过5个词。

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