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从一个关系数据库中选出指定的若干属性的操作称为________
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II型呼吸衰竭的血气分析结果应是APaO2<60mmHg,PaC02正常BPaO2正常,PaC02≥50mmHgCPaO2<60mmHg,PaC02>50mmHgDPa O2≤60mmHg,PaC02≥50mmHgEPa O2≥50mmHg,PaC02≥50mmHg
2. About a quarter of American adults say that they __________ a book in whole in the past year.
Many Americans understand the life-saving value of the seat belt—the national use rate of it is at 90.1%.
Have your insurance card ready when you go to the doctor or to pick up a prescription (处方). Your ecard will have basic information on it, including the insurance provider, the policy number, and the expiration (到期) date.Knowing your policy benefits can make a huge difference, especially if you are involved in a medical emergency. Before getting insurance, you will find out about what and how much your insurance covers. You can find this information on your insurance provider's website.Also, stay updated! Make sure you are aware of any changes in your insurance benefits.Where to StartLook into finding a doctor that you can go to regularly for your check-ups and illness. Having one doctor who knows about many aspects of your health ensures you get the best care.If your college has a clinic (诊所)， that may be a good place to start. If this isn't a good choice for you, look into nearby clinics in the area. Be careful to check what insurance plans they accept. This is important because health care can be expensive.1. What should you do before going to a doctor?You should have your ___________________________ ready.2. What information can be found on your insurance card?The insurance provider, ________________________, and the expiration date.3. Where can you find the information about what your insurance covers?On your _______________________________________________.4. Why should you always stay updated?To be aware of _______________________________ in the insurance benefits.5. Why is it important to check what insurance plans the clinics accept?Because health care can be _____________________________________.
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