In America, drivers' education is part of the regular high school curriculum. Every student in his or her second year of high school is required to take a class in driver's education. However, unlike other courses, it is not given during the regular school year. Instead it is a summer course.

    The course is divided into two parts: class time for learning laws and rules and driving time to practice driving. Class time is not unlike any other class. The students study the basic traffic laws from a text to pass the written driving test that is given to anyone who wants to get a driver's license.

    Driving time is a chance for the students to get behind the wheel and practice starting. Each student is required to drive a total of six hours. The students are divided into groups of four. The students and the instructor go out driving for two hours each time. So each student gets half an hour driving time per outing.

    Drivers Ed cars are unlike other cars in which they have two sets of brakes(刹车), one on the driver's side and one on the other side where the instructor sits. So if the student driver should run into difficulties, the instructor can take over. The car also has another special feature. On the top of the car is a sign that reads: STUDENT DRIVER. That lets nearby drivers know that they should use extra caution because the student driver is a beginning driver, not very experienced.

    After the student has passed the driver's education course and reached the suitable age to drive (this age differs in every state but in most cases the person must be 16 years old), they can go to a the state office to take their driver's test, which is made up of an eye examination, a written test, and a road test. The person must pass all the three tests in order to be given a driver's license.

    As we all know,drinking beers while running can upset the stomach.However,that's all part of the attraction of the Beer Mile,a unique race that has participants competing in running and drinking.The Beer Mile Race started off as a tradition in 1990,when a group of Canadians thought it would be fun to race each other while drinking a few beers.But it has come a long way since then.The Beer Mile Race is now a major sporting event with around 100,000 official competitors,brand name sponsors and so on.In 2015,the first Beer Mile World Classic was held in San Francisco,where all of the record holders from Canada and the United States came together for the competition.But this year,the event was organized in London,in an effort to take in more competitors about the sport outside North America.

    The rules of the race are pretty simple: runners have to consume four beers before each of the four 400-meter laps making up the famous Beer Mile.The beers can come in bottles or cans but should not be less than 355ml and must be at least 5% alcohol.The drink like apple juice will not do.Runners must drink the beers within a 10 meter zone before the start/finish line and then they are required to tip the bottle/can over their heads to confirm it is empty.

    In the case of vomiting（呕吐）during the race,and yes,there's quite a bit of that during the Beer.Mile,offenders must complete one more lap at the end of the race.Organizers mention that even in the case of vomiting several times, only one more lap must be completed.

    This year,the Elite Men's race was won by Canadian Corey Bellemore,who also set a new world record with a time of 4 minutes and 34 seconds.“I just drink the beers as quickly as I could,hold them down and get the burps（饱嗝）out,”Corey said.“If you can drink a beer in 8 seconds and also run very fast with a feeling of vomiting,then you'll be fine like me.”

明朝中后期，商人王某经商致富后，其投资方向最有可能的是

83+____=25+____           39+____+24=____+(76+24)

24×____ =15×____          125×5×8×2=(____×____)×(5×2)

(25+50)×4=____×4+50×____

(75×5)×____ =75×(____×2)