Formerly , in the United States, many nurses worked as private duty nurses rather than in hospitals.
A、PreviouslyA
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Comets are still regarded with awe by some people.
The Native American interpreter Sacajawea was a valuable member of the Lewis and dark expedition in 1805.
Mary McCarthy s satires 讽刺文学 are couched in a prose style that has a classic precision.
Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
Themegaphone(microphone)makesthevoicesoundlouderbecauseitpointssoundwavesinonedirectionandkeepsthemfromspreadingoutinalldirections.
