题目内容
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From the passage, how many places have the name Valencia？
A. One.
B. Two.
C. Three.
D. Four.
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Human's Hands
Archaeological records--paintings, drawings, and carvings of humans engaged in activities involving the use of hands--indicate that humans have been predominantly right - handed for more than 5,000 years. In ancient Egyptian artwork, for example, the fight-hand is depicted as the dominant one in about 90 per cent of the examples. Fracture or wear patterns on tools also indicate that a majority of ancient people were fight - handed.
Cro-Magnon cave paintings some 27,000 years old commonly show outlines of human hands made by placing one hand against the cave wall and applying paint with the other. Children today make similar out lines of their hands with crayons on paper. With few exceptions, left hands of Cro-Manganese are displayed on cave walls, indicating thai the paintings were usually done by right-handers.
Anthropological evidence pushes the record of handedness nearly human ancestors back to at least 1.4 million years ago. One important line of evidence comes from flaking patterns of stone cores used in tool making: implements flaked with a clockwise motion (indicating a right- handed toolmaker) can be distinguished frp, those flakea wan a counter- clockwise rotation (indicating a left -handed toolmaker).
Even scratches found on fossil human teeth offer clues. Ancient humans are thought to have cut meat into strips by holding it between their teeth and slicing it with stone knives, as do the present -day Inuit. Occasionally the knives slip and leave scratches on the users' teeth. Scratches made with a left - to - right stroke direction (by right-handers) are more common than scratches in the opposite direction (made by left-handers).
Still other evidence comes from cranial morphology: scientists think that physical differences between the right and left sides of the interior of the skull indicate subtle physical differences between the two sides of the brain. The variation between the hemispheres corresponds to which side of the body is used to perform. specific activities. Such studies, as well as studies of tool use, indicate that right - or left – sided dominance is not exclusive to modem Homo sapiens. Populations of Neanderthals, such as Homo erects and Ho mo habilis, seem to have been predominantly right -handed, as we are.
What is the main idea of the passage？
A．Human ancestors became predominantly right- handed when they began to use tools.
B．It is difficult to interpret the significance of anthropological evidence concerning tool use,
C．Human and their ancestors have been predominantly right -handed for over a million years.
D．Human ancestors were more skilled at using both hands than modem humans.
In this passage, "artificial food" refers to food made from ______.
A．milk
B．grain
C．protein
D．soybeans
From the passage we can see that the writer's attitude toward "village life" is
A．positive
B．negative
C．neutral
D．unclear
We learn from the passage that Computertown USA was a______.
A．town.
B．project.
C．library.
D．school.
It can inferred from the passage that a storm is carded by ______.
A．light winds
B．clouds
C．high winds
D．loud sounds
It can be inferred from the passage that the longer an eel is the ______.
A．more beneficial it will be to science
B．more powerful will be its electrical charge
C．easier it will be to find
D．tougher it will be to eat
According to the passage, magnesium was first obtained from ______.
A．rocks found on land
B．great amounts of ocean water
C．the sea floor
D．major industrial sites
This passage is most probably taken from an article entitled " ______ ".
A．Energy Conservation
B．House Building Crisis
C．Air Pollution Indoors
D．Traps in Building Construction
It is clear from the passage that Chevies refer to ______.
A. the murdered couple
B. elderly owners of cars
C. computers
D. Chevrolets
