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     People from all over the world like to travel to the US.Millions of people visit it each year, and they

spend billions of dollars.Tourism is actually one of the leading industries.Many people like to visit famous

US cities, such as New York City, Washington D. C., Miami, Chicago, Dallas, New Orleans, Denver,

Los Angeles, or San Francisco.Each of those has many tourist attractions.For example, New York has

Broadway plays, and it also has some of the tallest buildings in the world, such as the Empire State Building and the   World Trade Center. The World Trade Center that was 411 metres high and had 110 storeys with a twin tower used to be an office building for 1,200 firms. But it was destroyed completely by the

planes of the terrorists on Sept.11,2001. Washington has government buildings as well as monuments and museums. Dallas has the site of President Kennedy's murder. New Orleans has jazz music and the cities

in California have many ethnic groups with lots of good food.Disneyland in California and Disney World in Florida are very popular attractions for tourists with children.The space centers in Florida and Texas are

popular sites for people at all ages to visit. Some tourists prefer to find sites with natural beauty in rural

settings. The mountains in the east and the west are very popular with campers, hikers, and climbers.Some come just to ski and stay in fancy ski resorts like Aspen or Vail. Other come just to golf at nice golf

resorts like Pinewest, which is now partly owned by the Japanese who love golf. Some come to watch

sports, but tickets can be expensive.It costs $100 just to get a back row seat to see a Chicago Bulls game.Two of the most popular places for tourists to visit are the Grand Canyon(大峡谷) and  Yellowstone

Park.At times Yellowstone is so crowded with tourists that it almost seems like a city.With the growing

popularity at country music, many people now visit Nashville where most of the recordings are made or

Branson where many stars have their own theatres.

1. Today a tourist visiting New York can't visit ________.

A. Broadway  

B. the Empire State Building

C. the World Trade Center  

D. New York Port

2. If you are interested in politics, the city that you are most likely to visit is ________.

A. Washington D. C.  

B. New York

C. New Orleans  

D. Chicago

3. The following places are some attractions that have something to do with music except ________.

A. Nashville  

B. Branson

C. New Orleans  

D. Dallas

双踪示波器的电子开关有（）和（）两种转换方式。

在表单MYFORM的INIT事件中，设置表单背景颜色为红色，正确的命令是( )。

A．MYFORM.BACKCOLOR=RGB(255,0,0)

B．THIS.PARENT.BACKCOLOR=RGB(255,0,0)

C．THISFORM.PARENT.BACKCOLOR=RGB(255,0,0)

D．THIS.BACKCOLOR=RGB(255,0,0)

选择和运用教学方法的基本依据是什么？

吊钩钩柄不得有塑性变形。钩柄直径d及螺纹部分，在腐蚀后的尺寸不得少于基本尺寸的（）％，同时不允许有变形和裂纹，否则应报废。

A.80

B.85

C.90

D.95