2019 年 12 月四级考试试卷( 3 ) Part III Reading Comprehension Section A 请填写单词对应的大写序号,例如 E 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, travelling at a high altitude( 高度 ) 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( 洞察力 ) of sweet and salty foods dropped by almost 30 percent in a simulation( 模拟 ) of air travel. However, you can make your taste buds( 味蕾 ) 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 sitting 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) adjusted B) channels C) equivalent D) experience E) filters F) frequently G) individuals H) originally I) particular J) primarily K) reduce L)renovated M) smooth N) thrive O) unpleasant