阅读理解。
BEIJING (AFP)-Archaeologists in China have uncovered more than 3 000 dinosaur footprints, state media
reported, in an area said to be the world's largest grouping of fossilised bones belonging to the ancient animals.
The footprints, believed to be more than 100 million years old, were discovered after a three-month
excavation (发掘, 出土) at a gully in Zhucheng in the eastern province of Shandong, the Xinhua news agency
reported.
The footprints range from lo to 80 centimetres (4 to 32 inches) in length, and belonged to at least six
different kinds of dinosaurs, including tyrannosaurs, the report said Saturday.
Wang Haijun, a senior engineer at the Chinese Academy of Sciences, said the footprints faced the same
direct.ion, Xinhua said.
This indicated a possible migration or a panic escape by plant-eating dinosaurs after an attack by predators
(食肉动物), Wang added.
Archaeologists have found dinosaur fossils at some 30 sites in Zhucheng, known as "dinosaur city". The
region has seen two major digs since 1964, and experts say the discovery of so many dinosaurs in such a
dense area could provide clues on how the animals became extinct millions of years ago.
Plans are being made to set up a fossil park in the area.
1. We can infer from the text that _____. [ ]
A. most of the footprints are more than 32 centimeters long
B. the footprints found belong to some predators
C. the dinosaurs were runmng in all directions because of an attack
D. the area is considered to be a perfect tour source
2. Which statement below is true according to the passage above? [ ]
A. The number of the footprints found is more than 3 000.
B. The dinosaurs may live in an age 10 000 000 years ago.
C. The discovery of fossils may open a new age.
D. Archeologists still wish to find some more fossils.
3. The passage may be picked out from _____. [ ]
A. a magazine
B. a science book
C. a newspaper
D. a students' textbook
侯德榜先生，1939年发明了著名的侯氏制碱法，其核心反应原理可用如下化学方程式表示：
