阅读理解Excerpt 1 : The process of vaccination
阅读理解Excerpt 1: American employers cut back
阅读理解The idea of humanoid robots is not new. They
阅读理解"Across the rest of America, packing for
阅读理解More American mothers than ever are working,
阅读理解Faith in medicine runs deep in America. We
阅读理解Electronic mail has been in widespread use
阅读理解When Liam McGee departed as president of
阅读理解Excerpt 1: The Council of Mortgage Lenders
阅读理解Cheap long distance, the ability to spoof
阅读理解Telecommuting—substituting the computer for
阅读理解By far the most common difficultly in study
阅读理解" Abortion is a personal issue. No one
阅读理解Top marathon runners tend to be lean and
阅读理解In 2011, green homes made up roughly 17
阅读理解The rich have traditionally passed their
阅读理解The members of Duke University's computer
阅读理解" Years ago, a friend of mine observed that
阅读理解A recent U. S. study claims that in areas
阅读理解Being sociable looks like a good way to add