未分化小细胞癌 A．以老年男性多见，常为中央型肺癌，生长速度_爱下问搜题

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问题单项选择题

未分化小细胞癌

A．以老年男性多见，常为中央型肺癌，生长速度较慢，对放疗和化疗较敏感，血行转移发生较晚
B．多起源于大支气管，细胞大，胞浆丰富，胞核形态多样，分化程度低，常在发生脑转移之后才被发现
C．多发于年轻男性，常为中央型肺癌、恶性程度高，生长快，较早出现淋巴和血行广泛转移，预后最差
D．较多见于女性，多为周围型肺癌，早期常无明显临床症状，往往在胸部X线检查中被发现
E．较多见于女性，分化程度高，生长较慢，癌细胞沿细支气管、肺泡管和肺泡壁生长，不侵犯肺泡间隔

答案

参考答案：C

解答题

解不等式组

完形填空

I take the train to work every morning from a train station near my house. I can get to the station quite _36__ because there’s a short cut（捷径）to the station. But in the summer, it can get quite smelly because of all the   37. So I always try to   38   through it. Today I was trying to do so as usual __39__ something made me stop for a moment. I saw the most beautiful __40__ by an old woman walking in front of me with the help of a white __41__.
She was short and   42   and had white hair. She was walking __43__ as each step took some effort. I hadn’t specially noticed her   44 , until she stopped near a rubbish bin（垃圾箱）.
She slowly placed her walking stick ___45__ the rubbish bin. Then she leaned （斜倚着） on it with her right hand. She bent down and _46__ the rubbish. She clearly found it _47___ and it took her a while. She _48__ some rubbish with her left hand and slowly straightened herself up again. All the while she used the rubbish bin to __49   herself. She threw the rubbish inside the bin and then   50 walking. It all took her great effort.
There’s no much rubbish and no one ever does ___51__ about it. I was moved to _52__ this old woman make such a great effort to keep even a small part of it __53__! I haven’t been able to __54__ thinking about that all day.
I want to follow her example. I’ve decided to pick up rubbish of the __55__ if I meet from now on. I hope people will do the same as I do.

A．at midnight

A．searched for

C．reached for

B．dropped down