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问题 填空题

如图，生活中人们常用酒精为高烧病人降温，这是利用了酒精在______（填一物态变化名称）过程中______（填“吸”或“放”）热．

答案

酒精易挥发，由液态变成气态，发生的是汽化现象，在汽化过程需要向周围吸收热量，故可以给发热病人降温．

故答案为：汽化；吸．

完形填空

第四部分: 写作(共两节，满分35分)

第一节：对话填空(共10小题；每小题1分．满分10分)  

W：I had such a (76) t_______ day yesterday that I’m really starting to (77) b______ that Friday the thirteenth is unlucky .

M：Why ? What (78) h_______ ?

W：Everything went (79) w______ . For example , I had to meet an important customer in the morning and on the way to town the car (80) b______ down . When I finally got there , the customer had already left .

M：That certainly is bad luck .

W：That’s not (81) a____. In the afternoon the children asked some kids over to play and they had a pillow (82) f_______ and tore one of the pillows . When I got home there were feathers all over the (83) r_____

M：My goodness !

W：And to make matters (84) w_____  , my boss and his wife arrived while I was (85) c_______ up the house . I had forgotten that I’d invited them for dinner.                                                                               
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问答题 简答题

DNA复制起始过程如何受DNA甲基化状态影响？
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