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The wet volcanic ash that covered a Maya village in Central America in about AD 595 coated and pre- served everyday objects beans, chilies, rope, gourds, even unwashed dishes -- just as they had been left, giving archaeologists a rare chance to learn about the everyday lives of the people of this pre-Columbian village. Exploration of the site, which is located in El Salvador and has been given the name Joya de Ceren, is now in its eighth season, and archaeologists are continuing to make new finds.
The volcanic eruption that entombed Ceren more than 1400 years ago began when lava pushed its way close enough to the surface to create a great explosion of steam and ash that was centered just north of the village. The archaeologists have not found the remains of any human beings killed by the eruption in Ceren, suggesting that they had enough warning to flee. The eruption buried Ceren in a layer of ash 4 to 6 m (1
A. Ceren at that time enjoyed a high civilization
B. people in Ceren were more intelligent than people today
C. Ceren’ s disappearance was a tragedy
D. the power of nature was great

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The wet volcanic ash that covered a Maya village in Central America in about AD 595 coated and pre- served everyday objects beans, chilies, rope, gourds, even unwashed dishes -- just as they had been left, giving archaeologists a rare chance to learn about the everyday lives of the people of this pre-Columbian village. Exploration of the site, which is located in El Salvador and has been given the name Joya de Ceren, is now in its eighth season, and archaeologists are continuing to make new finds.
The volcanic eruption that entombed Ceren more than 1400 years ago began when lava pushed its way close enough to the surface to create a great explosion of steam and ash that was centered just north of the village. The archaeologists have not found the remains of any human beings killed by the eruption in Ceren, suggesting that they had enough warning to flee. The eruption buried Ceren in a layer of ash 4 to 6 m (1
A. because grasses that made up the thatched roof of the dwelling were still new, that the structure was recent
B. he left the site, located northwest of San Salvador, the capital, in 1980 unwillingly
C. by sending radar signals through the ground in order to detect buried objects, he located 22 additional structures still buried in ash
D. when the teeth were found, he said that throwing teeth on the roof is a tradition still practiced by some people in rural El Salvador today

[单项选择]The wet volcanic ash that covered a Maya village in Central America in about AD 595 coated and preserved everyday objects beans, chilies, rope, gourds, even unwashed dishes -- just as they had been left, giving archaeologists a rare chance to learn about the everyday lives of the people of this pre-Columbian village. Exploration of the site, which is located in E1 Salvador and has been given the name Joya de Ceren, is now in its eighth season, and archaeologists are continuing to make new finds.
The volcanic eruption that entombed Ceren more than 1,400 years ago began when lava pushed its way close enough to the surface to create a great explosion of steam and. ash that was centered just north of the village. The archaeologists have not found the remains of any human beings killed by the eruption in Ceren, suggesting that they had enough warning to flee. The eruption buried Ceren in a layer of ash 4 to 6 m (13 to 20 ft) deep over a period of a few days.
One of the most striki
A. Ceren at that time enjoyed a high civilization
B. people in Ceren were more intelligent than people today
C. Ceren’s disappearance was a tragedy
D. the power of nature was great

[单项选择]What beneficial result does the volcanic ash have（　）.
A. It served as a fertilizer for crops.
B. It formed a new mountain.
C. It destroyed various insect pests.

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W: The volcanic ash from the eruption of Mount Saint Helens certainly caused a lot of damage, didn’t it
M: It did, but not as much as experts have predicted. It seems to have had a beneficial effect as well.
W: Really But were crop losses great
M: Yes, However, since the weather following the eruption was unexpectedly good, some crop yields remained steady or even increased beyond normal expectancy levels.
W: I’m glad to hear that. But what was the beneficial effect you mentioned
M: A mass destruction of various insect populations.
W: How could the ash kill insects without effecting people too
M: It’s highly abrasive and quickly wears away the outer wax layer, protecting insects bodies. Removal of that layer causes the insects to lose body moisture by evaporation, the result is usually lethal.
W: How about that Sounds like an effective yet natural insecticide.

What can be inferred about the eff
A. It’s lethal upon contact.
B. It has relatively little harmful effect.
C. It affects the sense of hearin