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| ______ by greater demand of vegetables, farmers have built more green houses. |
[ ] |
| A. Driven B. Being driven C. To drive D. Having driven |
A、the inhibition of the signal transmission at neuro-muscle junction.
B、the decrease of the action potential amplitude.
C、the decreae of the speed action potential propagates on the nerve fiber.
D、the low excitability of the muscle.
E、the decreased efficiency of the signal transmission at triad of the sarcolemma.
| 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 |
此题为判断题(对，错)。
The period of Middle English extends roughly from the twelfth century through the fifteenth.The influence of French(and Latin,often by way of French)upon the vocabulary continued throughout the period,the loss of some inflections and the reduction of others accelerate, and many changes took place within the grammatical systems of the language.A typical prose passage, especially one from the later part of the period, will not have such a foreign look to us as the prose of Old English, but it will not be mistaken for contemporary writing either.
The period of Modern English extends from the sixteenth century to our own day.The early part of this period saw the completion of a revolution in vowel distribution that had began in late Middle English and that effectively brought the language to something resembling its present pattern.Other important early developments include the stabilizing effect on spelling of the printing press and the beginning of the direct influence of Latin, and to a lesser extent.Greel pm the vocabulary.Later, as English came into contact with other cultures around the world and distinctive dialects of English developed in the many areas which Britain had colonized, numerous other languages made small but interesting contributions to our word-stock.
1.The earliest writing record of English available to us started_____.
A.from the seventh century
B.from the fifth century
C.from the twelfth century
D.from the ninth century
2.What is the main features of the grammar of Old English?()
A.The influence of Latin
B.A revolution in vowel distribution
C.A well-developed inflectional system
D.Loss of some inflection
3.What can be inferred from the passage?()
A.Even an educated person cannot read old English without special training
B.A person who knows French well can understand old English
C.An educated person can understand old English but cannot pronounce it
D.A person can pronounce old English words but cannot understand them
4.Which of the following is NOT mentioned?()
A.French
B.Latin
C.Greek
D.German
5.What is the most remarkable characteristic of Modern English?()
A.Numerous additions to its vocabulary.
B.Completion of a revolution in vowel distribution.
C.Gradual changes in tis grammatical system.
D.The direct influence of Latin.
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