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问题 解答题

一辆自行车车轮的外直径是40厘米，如果平均每分钟转100周，要通过一座全长94.2米的桥，大约需要几分钟？

答案

3.14×40=125.6（厘米）

125.6×100=12560（厘米）

12560厘米=125.6米

94.2÷125.6≈1（分钟）

答：要通过94.2米的桥，大约需要1分钟．

解答题
在△ABC中，如果lga-lgc=lgsinB=-lg
2
并且B为锐角，试判断此三角形的形状特征．
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阅读理解
                   Part of A Bus Schedule

▼A description of the frequency codes are listed at the end of the page for your convenience. If there is no code listed, then the trip operates daily, seven days a week. This schedule is the same one found in the current printed schedule brochure, which you can download above.
▼Click the agency name to find hours of operation, payment methods and driving directions.
▼SHADING: Indicates the Logan Express non-stop bus service.

 
 

 
Read Across
Back to Top
NORTHBOUND
Leave
Leave
Arrive
Leave
Arrive
Arrive
Logan Airport
Boston(South Station)
Portland
Portland
Bangor
Orono-UMaine
～5:55a
5:45a
7:55a
 
7:15a
8:00a
10:00a
9:15a
10:00a
11:55a
12:01p
2:15p
∧2：45p
11:25a
……
1:35p
 
 
 
……
12:01p
1:55p
 
 
 
12:25p
……
2:35p
 
 
 
～1:25p
1:15p
3:35p
 
 
 
1:25p
2:15p
4:10p
4:15p
6:30p
∧6:50p
2:25p
……
4:35p
 
……
3:15p
5:10p
3:25p
4:15p
6:10p
4:25p
……
6:35p
……
5:15p
7:10p
5:25p
……
7:35p
5:25p
6:15p
8:10p
8:15p
10:30p
10:50p
6:25p
……
8:35p
With Concord Trail ways,
no reservations necessary!
Buy tickets on the day of travel.
……
7:15p
9:10p
7:25p
8:15p
10:10p
8:25p
……
10:35p
9:25p
10:15p
12:10a
～11:25p
11:15p
1:25a
 
Important frequency codes for above schedule:
～Trip leaves Boston South Station FIRST before picking up at Logan Airport.
★Trip operates Sundays ONLY
∧Trip operates Fridays＆Sundays ONLY
＃Trip operates to Logan Airport FIRST before dropping off at Boston South Station
Italics indicate a bus change in Portland.
★★Service to University of Maine at Orono operates only when school is in session, beginning/end is noted under Holiday＆College Notices. The service is also listed in our published schedule.
61. Which of the following trips leaves Boston South Station first before picking up at Logan Airport
A.11:15P  B. 6:15P   C. 8:15P   D. 10:00P
62. Which of the following airport departures does NOT stop at South Station in Boston?
A. 9:15 morning bus                     B. 12:25 afternoon bus
C. 5:25 afternoon bus                   D. 9:25 evening bus
63. According to the schedule, when the service is available, how many buses per day go from Logan Airport to the University of Maine at Orono?
A. 1             B. 3              C. 12              D. 17
64. According to the notes under the schedule, when would students NOT be able to get a bus to the University of Maine from Boston?
A.At weekends  B. In session. C. During university holidays. D. In the case of bad weather
65. Which of the following best describes the ticket policy of Concord Trail ways?
A. Tickets must be booked online.
B. Reservations are necessary.
C. Tickets can be bought on the travel day.
D. Discounts are provided for advanced booking.
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