问题 问答题 简答题

良恶性肿瘤有何区别?

答案

参考答案:

(1)组织分化程度:良性肿瘤分化好,异型性小,与原有组织的形态相似;恶性肿瘤分化不好,异型性大,与原有组织的形态;

(2)核分裂像:良性肿瘤无或稀少,不见病理性核分裂像;恶性肿瘤多见,并见病理性核分裂像;

(3)生长速度:良性肿瘤缓慢;恶性肿瘤较快;

(4)生长方式:良性肿瘤膨胀性生长或外生性生长,前者常有包膜,与周围组织一般分界清楚,故通常可推动后者每伴有浸润性生长;恶性肿瘤浸润性生长或外生性生长,前者无包膜,一般与周围组织分界不清楚,通常不能推动;

(5)继发改变:良性肿瘤很少发生出血、坏死;恶性肿瘤常有出血、坏死、溃疡形成等;(6)转移:良性肿瘤不转移;恶性肿瘤常有转移;

(7)复发:良性肿瘤手术切除后很少复发;恶性肿瘤手术切除等治疗后较多复发;

(8)对机体的影响:良性肿瘤较小,主要为局部压迫和阻塞。如发生在重要器官,也可引起严重后果;恶性肿瘤除压迫和阻塞外,还可破坏原发处和转移处的组织,引起坏死、出血、感染、恶病质。

完形填空
完形填空。
      India has sent  1  first spaceship to the moon. Scientists sent the spaceship on October 22nd, 2008 in
a place  2  Sriharikota in India. It  3  to the moon on the morning of Wednesday. People all over India watched
this important moment  4  TV. They celebrated their success happily. A head of scientists said  5 ," India has
started the first step to the moon and this is a very good start for us." The spaceship will  6  around the moon
and it will look for water on the moon. This is  7  important for India but also important for the whole world.
And India became the  8  country including (包括) China and Japan in Asia. Japan has sent unmanned (无人的)
spaceship to the moon. And our great Chinese astronaut  9  out of the spaceship and started our first space
walk  10  27th September 2008.
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( )8. A. three  
( )9. A. walks  
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单项选择题 B1型题