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【简答题】
Finally, some good news about airplane travel. If you are on a plane with a sick passenger, you are unlikely to get sick. That is the 1) of a new study that looked at how respiratory (呼吸道) viruses 2) on airplanes. Researchers found that only people who were seated in individual - had a high risk of catching the illness. All other passengers had only a very 3) chance of getting sick according to the findings. Media reports have not necessarily presented 4) information about the risk of getting infected on an airplane in the past. Therefore , these new findings should help airplane passengers to feel less 5) to catching respiratory infections while traveling by air. Prior to the new study. litter was known about the risks of getting 6) infected by common respiratory viruses, such as the flu or common cold, on an airplane, the researchers said. So, to 7) the risks of infection, the study team flew on 10 different 8) in the US. 9) side of a person infected with flu, as well as those sitting one roe in font of or behind this individual, had about an 80 person chance of getting sick. But other passengers were 10) safe from infection. They had a less than 3 percent chance of catching the flu. A) accurate B) conclusion C) directly D) either E) evaluate F) explorations G) flights H) largely I) nearby J) respond K) slim L) spread M) summit N) vividly O) vulnerable
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参考答案:
举一反三
【简答题】n. 约会,约定,预约
【简答题】电磁炉是利用电磁感应原理,使金属锅体在不断变化的磁场中产生感应电流,感应电流在金属锅体内的闭合回路中流动,这是利用了电流的 ______(选填“化学效应”、“磁效应”或“热效应”)来加热金属锅体,从而烹饪食物.其中食物从金属锅体上是通过 ______方式获得内能的.
【判断题】光纤分为单模光纤和多模光纤
A.
正确
B.
错误
【简答题】n. 约定,约会, 预约
【简答题】逐步聚合的方法有
【单选题】光纤分为单模光纤和多模光纤,两种光纤的区别是()
A.
单模光纤的数据速率比多模光纤低
B.
多模光纤比单模光纤传输距离更远
C.
单模光纤比多模光纤的价格更便宜
D.
多模光纤比单模光纤的纤芯直径粗
【单选题】光纤分为单模光纤和多模光纤,这两种光纤的区别是
A.
单模光纤的数据速率比多模光纤低
B.
多模光纤比单模光纤传输距离更远
C.
单模光纤比多模光纤的价格更便宜
D.
多模光纤比单模光纤的纤芯直径粗
【简答题】光纤分为 光纤和 光纤。
【单选题】电磁炉是利用( )加热原理烹饪食物的。
A.
电热转换
B.
光电转换
C.
电磁感应
D.
磁电感应
【多选题】逐步聚合的聚合方法有 ( )。
A.
熔融聚合
B.
溶液聚合
C.
界面聚合
D.
固相聚合
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