决定植物细胞脱分化、再分化的关键因素是什么?

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问题:

决定植物细胞脱分化、再分化的关键因素是什么?

考点:自然科学相关工程与技术细胞工程细胞工程题库
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任务型阅读。
     Look! These are clothes of Michael's family. They buy them from Huaxing Clothes Store. This yellow
skirt is Michael's sister's. Do you know how much it is? It's 31 dollars. It's beautiful. These pants are
Michael's father's. They are black. They are 49 dollars. The red sweater is Michael's mother's. How
beautiful it is! It is 42 dollars. Oh,that's Michael's T-shirt. It's white. It is 18 dollars.
根据短文内容,完成下表。
Clothes
Color
Price
Michael
____1____
____2____
___3_____
Michael's sister
Skirt
____4____
____5____
Michael's father
____6____
____7____
____8____
Michael's mother
____9____
___10____
42 dollars
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男,55岁。腹胀、少尿1年,曾诊断为"乙肝肝硬化",未系统治疗。近1日呕血2次,呕吐物为暗红色,量约500ml,排黑便1次,约100g,感头晕、心悸,于县医院急症就诊。既往有冠心病史2年,间断口服药物治疗。查体:BP80/50mmHg,神志清,贫血貌,巩膜轻度黄染,心率108次/分,律齐。全腹无压痛及反跳痛,肝未触及,脾肋下2cm,腹水征(+),肠鸣音活跃。

应首先采取的措施是()

A.急诊手术治疗

B.注射垂体后叶素

C.急诊胃镜检查

D.口服普萘洛尔

E.补液、扩容、输血

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下列关于对青春期的认识中,不正确的是[ ]

A.青春期是学知识、长才干的关键时期  

B.我们应比青春期前更加重视面部的清洁

C.女生因担心脂肪积累而禁食脂类食物    

D.男女同学应保持正常的交往

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检修中的容器应怎样进行封闭?

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气压试验的危险性比水压试验的危险性()。

A.大

B.小

C.一样

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