【单选题】染色体、DNA、基因的关系是( )
A.
人体细胞中染色体的数目是一定的,每条染色体中有一个DNA分子,DNA上有一定数量的基因
B.
人体细胞中染色体的数目是不一定的,每条染色体中有一个DNA分子,DNA上有一定数量的基因
C.
人体细胞中染色体的数目是一定的,每条染色体中有多个DNA分子,DNA上有一定数量的基因
D.
人体细胞中染色体的数目是一定的,每条染色体中有一个DNA分子,DNA上有一个基因
【判断题】Price transparency refers to the ability of consumers to discover the actual costs merchants pay for products.
【单选题】关于人体细胞中染色体、DNA 基因的叙述正确的是( ) ①染色体数是一定的 ②染色体数是不定的 ③每条染色体有一个DNA分子 ④每条染色体有多个DNA分子 ⑤每个DNA分子上有一定数量的基因 ⑥每个DNA分子上有一个基因.
【单选题】Linder did _______ well in the sports meeting and she won the third place in the game.
【简答题】Writing Based on Knowledge and Experience For this task, you will write an essay in response to a question that asks you to state, explain, and support your opinion on an issue. Typically, an effectiv...
【单选题】第1题图中铰链四杆机构中构件1、3的名称为( )
【单选题】染色体、DNA、基因的关系是 ( )
A.
人体细胞中染色体数目一定,每条染色体中有一个DNA分子,DNA上有一定数量的基因
B.
人体细胞中染色体数目不一定,每条染色体有一个DNA分子,DNA上有一定数量的基因
C.
人体细胞中染色体数目一定,每条染色体中有多个DNA分子,DNA上有一定数量的基因
D.
人体细胞中染色体数目一定,每条染色体中有一个DNA分子,DNA上有一个基因
【单选题】听力原文:W: Did you watch television last night, Richard? M: Yes, I did. Was there anything that interested you, Laura? W: There was a good game. Did you see it? M: Oh, I didn't. I wanted to, but my wife ...
B.
It was an exciting game.
C.
Neither of the teams won the game.
【单选题】听力原文:W: Did you see Mary today? M: Yes, why did she have such a long face? W: I don't have the fuggiest idea. M: I thought she'd be happy. W: Yeah, especially since she got a promotion recently. What ...
C.
She's longing for a gift.
D.
She's hoping for a promotion.