问题
填空题
抛在空中的质量为200g的皮球，若不计空气阻力，它还受到一个__________力的作用，该力的大小为__________N，方向为__________，施力物体是__________。
答案
重，1.96，竖直向下，地球
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抛在空中的质量为200g的皮球，若不计空气阻力，它还受到一个__________力的作用，该力的大小为__________N，方向为__________，施力物体是__________。
重，1.96，竖直向下，地球
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Departure Locations: 8th Ave. between 49th & 50th Sts., Broadway between 47th & 48th Sts.,7th Ave. & 42nd St.
Departure Locations: 8th Ave. between 42nd & 43rd Sts.,8th Ave. & 52nd St.
Departure Times: 6:30 am-8:00 pm,7 days a week. Departure Locations: Broadway between 47th & 48th Sts., 7th Ave. & 42nd St.
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Walk the Freedom Trail, which is 2.5 miles long with 16 historic sites. Decide the length of walk you wish to take. Visit Boston Harbor. See the downtown financial district and cross the Charles River to visit the squares of Cambridge, Harvard & MIT universities. Philadelphia & Amish Country See the Liberty Bell and Constitution Square. Continue to Lancaster Country, home of the Amish people. Learn how Amish live without modern technology, electricity,running water or phones. Departure Time: 7:00 am. Departure Location: 125 Park Ave. between 42nd & 41st Sts. | |||||||||||||||
| 1. On which tour can you visit United Nations? | |||||||||||||||
| A. Downtown Tour. B. Shopping Day Trip. C. Uptown Tour. D. Night Tour. | |||||||||||||||
| 2. Which of the following is the cheapest for adults? | |||||||||||||||
| A. Escorted Day Trips. B. Uptown Tour. C. Downtown Tour. D. Night Tour. | |||||||||||||||
| 3. What can you see on the Uptown Tour? | |||||||||||||||
A. Different museums. | |||||||||||||||
| 4. What do you have to do if you want to join the Escorted Day Trips? | |||||||||||||||
| A. Book before the trip. B. Start out at 9:30 am. C. Take the bus at 7th Ave. & 42nd St. D. Walk the Freedom Trail all day long. |