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(sh)F(xin)иxB؞xķ

r(sh)g2021-01-08 13:45:13 иԇ ҪͶ

(sh)F(xin)иxB؞xķ

Ό(sh)F(xin)иxB؞x

(sh)F(xin)иxB؞xķ

Ƿ߀ӛиMĵu֘(bio)(zhn)@ôһl

Displays unity, progression, and coherence. ( wF(xin)y(tng)һfM(jn)B؞c(din))

@l(bio)(zhn)Ҫ҂ڌr(sh)ҪעµB؞ԡΞB؞ B؞ԾҪc֮gǶc֮gһNϺ߉݋ķʽM(jn)չ_˼·Ӵη@ӌµĺ̎܉׌һ(g)xߵ˼·һښxͬr(sh)µҪϢи`ÿһƪx¶һƪMģضwF(xin)˽y(tng)һfM(jn)B؞c(din)Ԯ(dng)҂xи•r(sh)͑(yng)ԓxB؞ԣtпRǰȱ“(lin)ϵK(do)ֻץ˾ֲϢȱwϢrô(dng)҂xr(sh)B؞Եx

B؞ͨͨ^ɷNʽwF(xin)Zx؏(f)߉݋BӡZx؏(f)ǃɂ(g)ӕij(g)m(x)ͨ^@(g)؏(f)Ϣm(x)ȥZx؏(f)жNʽ؏(f)ij(g)~ҲԳF(xin)ij(g)~Ľx~x~ɾԒIn Southwest France in the 1940s, playing children discovered Lascaux Grotto, a series of narrow cave chambers that contain huge prehistoric paintings of animals. Many of these beasts are as large as 16 feet (almost 5 meters). @ɾԒͨ^animalsbeastsͬxQϢm(x)ȥZx؏(f)߀ͨ^ijփ(ni)ݵĸnjijփ(ni)ݵľwչ_팍(sh)F(xin)ɾ䣺The animals are bulls, wild horses, reindeer, bison, and mammoths outlined with charcoal and painted mostly in reds, yellow, and brown. Scientific analysis reveals that the colors were derived from ocher and other iron oxides ground into a fine powder. @ɾԒͨ^red, yellow, and brownĸthe colors(sh)F(xin)B؞(dng)ȻZx؏(f)õֶ߀ͨ^~`\(yn)ƒɾ䣺But note that porosity is not the same as permeability, which measures the ease with which water can flow through a material this depends on the sizes of the individual cavities and the crevices linking them.

߉݋BӾͨ^ض߉݋P(gun)ϵ~wF(xin)ɾԒǶԒ֮gP(gun)ϵҊP(gun)ϵD(zhun)P(gun)ϵlP(gun)ϵfM(jn)P(gun)ϵ@Щ^~ʹ܉ʹ¸Ԯ(dng)߉݋P(gun)ϵ~r(sh)Ҫ@Щ߉݋P(gun)ϵ~_(d)߉݋P(gun)ϵȥx

҂TPO1 GROUNDWATERĵڶһ(g)Cչʾ„Ϣm(x)c(din)

The necessary space is there, however, in many forms. The commonest spaces(ԭ~جF(xin)) are those among the particles(formswչ_)sand grains and tiny pebblesof loose, unconsolidated sand and gravel. Beds of this material(~), out of sight beneath the soil, are common. They(~) are found wherever fast rivers carrying loads of coarse sediment once flowed. For example(߉݋P(gun)ϵ), as the great ice sheets that covered North America during the last ice age steadily melted away, huge volumes of water flowed from them.The water(ԭ~جF(xin)) was always laden with pebbles, gravel, and sand(loads of coarse sediment, known as glacial outwash, that was deposited as the flow slowed down.

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