下图是洋葱根尖有丝分裂的图像,其中A、B、C、D、E为细胞代号。请据图回答: (

题型:读图填空题

问题:

下图是洋葱根尖有丝分裂的图像,其中A、B、C、D、E为细胞代号。请据图回答:

(1)根据细胞周期写出图中所标出的细胞在有丝分裂中的正确顺序:______________。

(2)洋葱体细胞中染色体数为8对,则D细胞中染色体数为________条。

(3)A、B、C、D四个细胞中染色体数目相等的是_____________。

(4)B、C、D、E四个细胞中一条染色体上有2个DNA分子的是__________。

(5)图中观察染色体形态和数目的最佳细胞是_____________。

(6)洋葱根尖细胞的一个细胞周期大约为12h。某同学在做此实验时,观察到五个视野,平均每个视野中细胞总数为50个,处于细胞分裂间期的有40个,则分裂间期经历的时间大约为___________h。

考点:有丝分裂
题型:读图填空题
阅读理解
     You are welcome to Hong Kong Disneyland! When you enter the park, you'll be walking back in time. In Main Street
USA, you will see old-time taxis and yellow street, lamps. This is a small US town in the early 1900s. If you go into the
shops or restaurants, you can enjoy delicious food!
     A train may take you to a beautiful place high in the air. It's Sleeping Beauty Castle. Now you are in Fantasyland! It's
the home of your favourite Disney stories. Why not talk to Donald Duck? You can sit on a flying elephant, take a spin
(旋转)in the teacup, or go under the sea! In Adventureland, you'll go into a dark jungle(丛林地带). Follow the river,
surprises wait for you at every corner. In the middle of the river is an island with a tree-house. You can also watch the
dancing and music from the Disney classic(经典) The Lion King.
     Science-fiction(科幻小说) fans will get excited in Tomorrowland. You can join a cartoon character to save the world.
It's also cool to rocket(乘火箭) through outer space in own spaceships!
     Here, you'll find surprises that are not in other Disneyland parks. Mickey even wears a red-and-gold Chinese suit.
Mulan will have her own pavilion(亭子).The fireworks at night are even played to go with music!
     任务:Cheng Ping来到了香港迪斯尼乐园,假设你是当地导游,请你根据材料相关信息,带Cheng Ping去能满足她愿望的地方。
Cheng Ping wants to
You could take her to
take pictures with Mulan.
Mulan Pavilion
get some information on space.
1.                         
take old cars.
2.                         
see the whole park.
3.                         
have a picnic.
4.                         
题型:读图填空题

简述我国N0.7信令网分那几个级别,信令网由哪几个部分组成?

题型:读图填空题

下列措施中,能使蒸发变慢的是【      】

A.冬天,用电热吹风吹湿了的头发

B.湿衣服晾在阳光直射的地方

C.瓶里的酒精用完后,及时盖上瓶盖并拧紧

D.用扫帚把地面的积水向周围扫开

题型:读图填空题

正确的处理应为:

A.支持疗法

B. * * 前后壁修补术

C.曼氏手术

D.阴式子宫切除+ * * 前后壁修补术

E. * * 纵隔成形术

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临终关怀的目的是()。

A.治疗疾病

B.延长生命

C.实现无苦而终

D.力求起死回生

E.促使生命早日结束

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