如图所示，在斜面上某处A以初速度v水平抛出一个石块，不计空气阻力，在确保石块能落
题型：选择题
问题：
如图所示，在斜面上某处A以初速度v水平抛出一个石块，不计空气阻力，在确保石块能落到斜面上的前提下，则
A．只增大v，会使石块在空中飞行的时间变短
B．只增大v，会使石块的落地点更接近A点
C．只将A点沿斜面上移，石块飞行时间变长
D．只将A点沿斜面上移，石块飞行时间不变
题型：选择题
阅读理解
Mapping Your World
Different forms of maps are appearing.They allow independent travelers to get local knowledge of
places they are visiting, from the official to the unusual.Meanwhile, hitech developments are creating new
ways for us to map the world.Here are two of our favorites:
Green Maps
Green Maps allows people to share with the world their knowledge of environmentally friendly places and attractions in the local areas.Users add information with a set of icons (图标) , making it easy to read any map, whatever the nationalities of those who produce it.At present there are over five hundred map
projects being developed in 54 countries.Green Maps' advertised idea is "think global, map local". It is a
wonderful way of gaining all sorts of information of a place, ranging from community gardens to good
places of birdwatching.
Green Maps is not specifically intended for travelers.Not all of its maps are online, so it may be
necessary for some users to communicate with the producers through the Green Maps website.
Map Mashups
Many people use online maps developed by Google, but not many know about the mashups of them.Working in a similar way to Green Maps, Map Mashups allows people to add icons of their own to
existing maps to express a certain topic.The mashups is so called because it combines all the knowledge
you could ever need.It ranges from the extremely useful, such as where all the World Heritage Sites are, to the most bizarre (古怪的), such as where America's drunkest cities are.With the mashups added to the
basic Google Maps, a multilayered (多层的) map can be created.
1. According to the passage, which of the following is a characteristic of Green Maps?
A. Aiming at environmental protection.
B. Introducing local attractions with icons.
C. Offering advice to independent travelers.
D. Collecting icons worldwide for local maps.
2. Which of the following icons is most probably NOT used in Green Maps?
A.
B.
C.
D.
3. "Map Mashups" is named with the word "mashups" because ________.
A. it is produced by users all over the world
B. it gathers various kinds of information
C. it shares icons with Green Maps
D. it is a branch of Google Maps
4. What do Green Maps and Map Mashups have in common?
A. They are created by local people.
B. They are environmentally friendly.
C. Users can edit maps on the Internet.
D. Users need to communicate with producers.