Don't believe all of the stereotypes(模式化的形象)you may have heard about Americans.
Even the ones that are true in general may not be true about specific individuals or a large part
of the population.For example,although Americans tend to be louder than people from other
cultures(especially at athletic events),many of the people you meet will be quiet and polite.Some
people may be intolerant, but most will be pleasant and welcoming.Remember that American
films and television exaggerate(夸张)in order to generate excitement, and so present a rather
false picture of what life in the United States is really like.Therefore,tourists in the US are not
always on their best behavior.
     Americans do tend to be more informal than people from other countries.It is common for
Americans to wear casual clothing to school and to greet professors by first name.However,
good manners and politeness are always appreciated.If you are polite, and dress a little more
formally than your American friends, it will not be poorly thought of.
     However,some businesses require their employees to wear a uniform or a suit.It would be
improper to wear a Tshirt and blue jeans to a job interview.Some of the more prestigious
restaurants require a coat and a tie.Americans tend to dress up for cultural events(the opera,
theater and ballet)and to dress down for athletic events.Formal wear is required at weddings
and funerals, or any other event with religion.If you rely on the stereotypes,you will likely put
yourself into an embarrassing situation.