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- 共用题干 Health Care in the USHealth care in the US is well-known but very expensive.Paying the doctors...
- 共用题干 Tiny InvadersThe human body is truly amazing.It allows us to sense the world around us,to do w...
- 共用题干 Scientists Develop Ways of Detecting Heart AttackGerman researchers have___1___a new generatio...
- The study also notes a steady decline in the number of college students taking science courses.
- 共用题干 Teaching Math,Teaching AnxietyIn a new study about the way kids learn math in elementary schoo...
- 共用题干 Old Man Myths and Realities1 When does a middle-aged man become an old man?Officially,of cours...
- 共用题干 Preferences Vary on Circumstances of DyingAmong terminally（晚期）ill people, attitudes differ on ...
- 共用题干 第三篇Exercise Lowers Employers Health CostsCompanies can save millions in health-care costs simp...
- 共用题干 Promising Resnlts from Cancer StudyA new experimental vaccine（疫苗）has shown promising results i...