To show how a common desk fan cools a person, Rhett Allain, a physics professor and writer for Wired magazine, performed a simple experiment. He wet a paper towel with warm water and wrapped it around a thermometer. Allain wrapped a second thermometer in a dry paper towel. Afterward, he set both thermometers in front of a fan. Initially the fan was turned off. The temperature of the thermometer wrapped in the wet paper towel decreased—at first rapidly, then more slowly—and eventually dropped below room temperature. After the fan was turned on, the temperature of the wet thermometer underwent another rapid decrease. By contrast, the temperature of the thermometer wrapped in the dry paper towel barely changed during the entire experiment. This experiment demonstrated the power of evaporation to cool wet objects, such as a sweaty person, and the role of a fan in making evaporation more effective.
Which choice most effectively combines the underlined sentences?
A.Allain wrapped a second thermometer in a dry paper towel, and then he set both thermometers in front of a fan.
B.Wrapping a second thermometer in a dry paper towel, Allain set both thermometers in front of a fan.
C.Before setting both thermometers in front of a fan, Allain had wrapped a second thermometer in a dry paper towel.
D.Allain set both thermometers down in front of a fan, but first he wrapped a second thermometer in a dry paper towel.
答案分割线
答案：A
点击下方阅读原文，获得SAT、托福的考试教材哦！
扫描下方小助手二维码，可以获得2018年3月SAT最近考题哦！
快报君知道，考SAT的同学当然还会考托福啦，这里有一份托福的福利~
主题：如何快速突破托福110+
讲座内容亮点：1、数名托福学员110分案例讲解； 2、托福考试“听力者得天下”听力高分解析； 3、托福口语的现场点评及VIP1对1诊断及提分方案的出具
主讲人：董惠玥老师
主讲人亮点：17年英语教学经验、14年出国留学教学经验、老托福听力及写作教师、宾夕法尼亚大学访问学者、原新东方托福口语名师/国外推广管理中心演讲师/标准化讲义编著者、西城区优秀民办教师、新托福国内第一代ETS认证教师、培养数名托福口语30分满分学员、曾用1小时授课帮助学员提高至28分、6小时课程帮助托福口语24分的学员提升至29分。
时间：4月29号（周日）下午14:00-16:00
地点：海淀区知春路银网中心大厦
（扫码报名即可）
推荐阅读：
藤校要什么样的中国学生，从2018录取结果看你的藤校梦还好吗？
ISIS又威胁恐袭，留学生需要注意的安全细节和诈骗手段大盘点！
长按识别二维码
加小助手咨询留学申请
