癌细胞的形态特征有哪些？_爱下问搜题

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问题问答题简答题

癌细胞的形态特征有哪些？

答案

参考答案：癌细胞大小，形态不一，通常比它的源细胞体积要大，核质比显著高于正常细胞；核形态不一，并可出现巨核，双核或多核现象.核内染色体呈非整倍态，某些染色体缺失，而有些染色体数目增加。

正常细胞染色体的不正常变化，会启动细胞凋亡过程，但是在癌细胞中，细胞凋亡相关的信号通路出现障碍，也就是说癌细胞具有不死性

选择题

We are working _________ that everyone invited will turn up.

A. assume	B. to assume
C. in the assumption	D. on the assumption

完形填空

Comedian Groucho Mark said, “Those are my principles. If you don’t like them, I have others.”
You and I have principles and we also have 31 . I have opinions about what I think is right or wrong or good or bad. But they’re only opinions —I could be 32 ! I won’t try to build my life around my opinions, 33 I’ll try to keep to my principles.
A 15-year-old boy learned a valuable 34 about life principles. One day, he found a wallet that 35 $127 as well as a woman’s 36 . He jumped onto his 37 and went to her house. He told her he found her wallet and she gave him a big 38 . She also gave him twenty dollars.
That evening the boy told his parents about the 39 and his father said, “I don’t think you should have 40 $20 for doing what you should have done. A person shouldn’t be rewarded for being 41 .”
He considered his father’s statement and 42 that he would return the money. He 43 biked to the lady’s home and gave her back the money. She didn’t want to 44 it, but he told her she had to — that his father 45 something to him that he had 46 realized before.
When ideals such as honesty and a personal standard of always doing the right thing guide our every action and decision, we 47 develop a good character. These great principles 48 our lives and make us into a person of 49 . They teach confidence. That boy is 50 to be raised by a wise father who had the wisdom to say, “Those are my principles.”

C．identification

A．performance

A．pointed out

C．immediately