问题
选择题
下列关于细胞分化的叙述中，不正确的是（ ）
A．一般来说，不同细胞分化后产生的差异是不可逆的
B．植物细胞的全能性大于动物细胞
C．细胞分化是生物界中普遍存在的生命现象
D．没有细胞分化，生物体也能正常生长发育
答案
答案：D
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下列关于细胞分化的叙述中，不正确的是（ ）
A．一般来说，不同细胞分化后产生的差异是不可逆的
B．植物细胞的全能性大于动物细胞
C．细胞分化是生物界中普遍存在的生命现象
D．没有细胞分化，生物体也能正常生长发育
答案：D
| 从对话后方框内的选项中选择适当的选项补全对话。 | |
| A: Hello, Sally! Congratulations to you for winning the first prize in the speech contest! B: 1______ A: You used to be shy when you talked to others. Why did you take part in the speech contest? B: Yeah, I used to be shy. And my mother was really worried about it. She told me I must have confidence in everything. She encouraged me to do that. A: 2______ B: I practiced the speech every day. In order to make it good, I had practiced it hundreds of times. A: 3______ B: I got excited and couldn't help crying when I won the prize,but at first I could hardly believe I was the winner. A: 4______ B: Yes, it changed me a lot. And it made me feel confident. I'm very thankful to all the people who helped me. A: Thanks for answering my questions. B: 5______
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