下列为使用温度计的操作步骤： A、取出温度计． B、估计被测物体的温度． C、使

已知正比例函数f（x）=kx（k＜0），用“＜““＞“符号连接：f（-1）______f（1）．

患者，男，41岁，刺激性咳嗽3个月余，低热1周，近3天咳痰带血丝。胸部CT如图，最可能的诊断为（）

A.淋巴瘤肺浸润

B.炎性病变

C.中央型肺癌并左肺下叶阻塞性炎症

D.周围型肺癌

E.细支气管肺泡癌并淋巴结转移

If you are like most people, your intelligence varies from season to season. You are probably a lot sharper in the spring than you are at any other time of the year. A noted scientist, Ellsworth Huntington (1876-1947), concluded from other men’s work and his own among peoples in different climates that climate and temperature have a definite effect on our mental abilities.
He found that cool weather is much more favorable for creative thinking than is summer heat. This does not mean that all people are less intelligent in the summer than they are during the rest of the year. It does mean, however, that the mental abilities of large numbers of people tend to be lowest in the summer.
Spring appears to be the best period of the year for thinking. One reason may be that in the spring man’s mental abilities are affected by the same factors that bring about great changes in all nature.
Fall is the next-best season, then winter. As for summer, it seems to be a good time to take a long vacation from thinking!

One possible reason why spring is the best season for thinking is that ______.

A．all nature, including man, is growing then

B．it lasts longer than the other seasons

C．it is not too warm and not too cold

D．both B and C

戏剧和书法篆刻家使用的繁体字等小众文化产品，正面临阵地锐减、影响下降的处境。这样的表现，从技术层面说，并无大的问题，因为实用主义统治的时代，那些已经不甚实用的东西，可以退出技术的范畴，但是，从文化产品的延续性而言，那些被动辄几千年中国文明史检验了的文化，它绝不能不为人知，也不能只能由书法家、戏剧家等专门人士扛着，如果最后的结果就是这样，那么终会曲终人散，留下一段文化的悲剧。 下列属于文中“文化悲剧”的是：

A．大量历史文物流失海外

B．繁体字被简体字取而代之

C．多种民间曲艺面临失传困境

D．少数民族生活被现代生活简化

切粒机进刀油压波动的原因？