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Millions of people travel by plane every single day. If you're planning on being one of them soon, you might not be looking forward to the __1__ feeling air travel often leaves you with. Besides the airport crowds and stress, traveling at a high altitude has real effects on the body. Although the pressure of the cabin is __2__ to prevent altitude sickness, you could still __3__ sleepiness or a headache. The lower oxygen pressure found in an aircraft cabin is __4__ to that at 6,000-8,000 feet of altitude. A drop in oxygen pressure can cause headaches in certain __5__ To help prevent headaches, drink plenty of water, and avoid alcohol and coffee.Airplane food might not really be as tasteless as you __6__ thought. The air you breathe in a plane dries out your mouth and nose, which can affect your sense of taste. Perception of sweet and salty foods dropped by almost 30 percent in a simulation of air travel. However, you can make your taste buds active again by drinking water. A dry mouth may __7__ taste sensitivity, but taste is restored by drinking fluids.Although in-flight infections __8__ in dry environments like airplanes, your risk of getting sick from an airplane is actually low because of the air __9__ used. Unless you 're setting next to someone who is coughing or sneezing, you shouldn't worry too much about getting sick. However, bacteria have been shown to live on cabin surfaces, so wash your hands __10__.A) adjustedB) channelsC) equivalentD) experienceE) filtersF) frequentlyG) individualsH) originallyI) particularJ) primarilyK) reduceL) renovatedM) smoothN) thriveO) unpleasant
鉴定委托书鉴定人员受理鉴定任务的法律凭证
来源于现场的痕迹叫做样本痕迹
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