有关下列两个细胞分裂图像说法正确的是_刷题宝

题干

有关下列两个细胞分裂图像说法正确的是（）

A：②能产生1种类型的生殖细胞

B：①、②中均含两对同源染色体

C：①能产生4种类型的生殖细胞

D：①②均是卵细胞形成过程中的细胞

上一题下一题 0.0难度选择题更新时间:2014-09-02 11:45:45

答案(点此获取答案解析）

A

同类题1

下列各图所示的实验原理、方法、装置或操作正确的是

同类题2

运动是物质的唯一特性，使事物处于显著的变化之中。（）

同类题3

如图甲所示,一次训练中，运动员腰部系着不可伸长的绳拖着质量m=11 kg的轮胎从静止开始沿着笔直的跑道加速奔跑，绳与水平跑道的夹角是37°，5 s后拖绳从轮胎上脱落，轮胎运动的

图象如图乙所示，不计空气阻力，已知sin 37°=0.6，cos 37°=0.8，g取10 m/s²，则下列说法正确的是（）

同类题4

阅读下面的材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Lucy： Hello, Mary, you look really tired. What's the matter?

Mary： I didn't go to sleep ____ midnight last night so I didn't get enough sleep.

Lucy： Sorry to hear that. Why don't you go to sleep ____ (early) tonight?

Mary： I hope so, ____ I have two after—school classes today. So I can only start ____ (study) after dinner.

Lucy： Maybe you should tell your parents ____ you can't do so many things.

Mary： I did, but they think it's important that I take more after—school ____ (class).

Lucy： Well, they ____ (possible) want you to get into a good senior high school.

Mary： Yes, I guess that's ____ reason.

Lucy： You should talk to your parents again. Explain that you need to get enough sleep to stay ____ (health).

Mary： That's a good idea. OK, I'll try to talk to ____ (they) again.

同类题5

作文：

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