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【简答题】
美国科学家将分离得到的成熟的胡萝卜根的韧皮部细胞进行培养，由单个细胞发育成了完整的新植株，过程图解如下。回答与之有关的问题： (1)科学家所用的这种生物技术叫做________。依据的理论基础是植物细胞具有_______性。B过程称为___________，C过程称为_____________。 (2)通过B过程产生的愈伤组织的细胞与根的韧皮部细胞在染色体的数目上是否相同？________________；染色体上所含的遗传物质是否相同？_______________；细胞的形态结构是否相同？________________。
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举一反三
【简答题】Which sentence is the topic sentence in Paragraph 6?
【简答题】Which sentence is the topic sentence in Paragraph 3?
【单选题】Which sentence is better in the interview?
A.
The requirement of the company is that employees be engaged in their respective duties seven and one-half hours a day.
B.
The company requires employees to work seven and a half hours a day.
【单选题】Which sentence is better in the interview?
A.
The requirement of the company is that employees be engaged in their respective duties seven and one-half hours a day.
B.
The company requires employees to work seven and a half hours a day.
【单选题】In which sentence is the thesis of the essay presented?
A.
Third sentence
B.
Fourth sentence
【单选题】Intonation identification: In which sentence is the speaker sure and expects the other person to agree with him?
A.
Laura is an English teacher, isn't she?( 升 调 )
B.
Laura is very beautiful today, isn't she?( 降 调 )
【单选题】Intonation identification: In which sentence is the speaker not sure about something and wants to confirm it? and in which is he sure and expects the other person to agree with him?
A.
Laura is an English teacher, isn't she?(升调)
B.
Laura is very beautiful today, isn't she?(降调)
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