单词:soil specific surface area
单词:soil specific surface area 相关文章
17 A It is completely flat B It has few rivers C It has many large lakes D It is hilly 18 A The soil has been overworked B The climate is cold C The weather is too dry D The soil is sandy 19 A By rais
EXPLORATIONS - Mars Exploration, Part 2 By Paul Thompson Broadcast: Wednesday, February 04, 2004 (THEME) VOICE ONE: This is Shirley Griffith. VOICE TWO: An artists picture of a Mars Rover vehicle. And
Hello,everyon [00:06.56]Today,we'll talk about another planet,Mar [00:24.76]Mars is one of the planets in the solar syste [00:40.96]It is the forth planet from the su [00:54.54]It is named for the Roman god of wa [01:09.28]because it appears fairly r
No statues, no obelisks, no temples, nothing to suggest this could once have been home to the ancient world's great lost capital. When I came first to this area and to this site, I was shocked. Nothing was to be seen at the surface. No clue where to
Water on the Moon Studies in the journal Science report that instruments on three different spacecraft have found evidence for widespread trace amounts of water on the moon. Karen Hopkin reports For all you space buffs who like to keep track of wher
68 科学家正在绘制洪水预报地形图 ENVIRONMENT REPORT September 14, 2001: Weather Maps For Floods (Start at 1'00
For all you space buffs who like to keep track of where the water is, it looks like you can add our very own moon to your list. Because according to a trio of papers appearing in the journal Science, the lunar surface is wetter than we realized. Fort
W: I think a drought has set in. It hasnt rained a drop for months. M: I think so too, but didn't it rain last month? W: It did rain last month, but the rainfall was only half the monthly average. M: Oh, that bad? W: That's right. It's really bad. I
Why does Florida have so many springs? Florida sits on a layer of porous limestone which acts as an underground reservoir or aquifer. This aquifer can absorb huge amounts of water. Where the pressure is great enough, springs bubble up, spewing up bil
How Rocks Appear In Your Garden I wonder how many of us went out this past spring to get our gardens ready for planting, smug in the thought that last year we got rid of all the rocks. Theres that nice big mound of them in the corner of the garden wh
Mars Rover to Begin Taking Soil Samples This Week Jessica Berman NASA engineers say the Mars rover will begin taking its first soil samples as soon as it departs the landing platform . Engineers say t
AGRICULTURE REPORT - Study Points to Risk in Common Method of Enriching Soil By Jerilyn Watson / Broadcast: Mon, 12 Nov 2007 16:00:00 UTC This is the VOA Special English Agriculture Report. For more than half a century, many farmers worldwide have a
AS IT IS 2015-05-25 Americas Famous Front Lawn Gets Overhaul Almost two kilometers of green grass stretch from the front of the U.S. Capitol building to the Washington Monument. Thousands of people walk on it every day. They also play games, have pic
While it may appear to be a completely chaotic place, 虽然它看上去好像是一个很混乱的地方, when you see it from above, there seems to be a whole grid of waterways and canals connecting each and every home. 但当你从上往下看,那
Recently at a site only two kilomtres to the southeast, archaeologists have unearthed the first traces of people living in the same period. It's a find that may finally answer why stonehenges located where it is. Here is the section through one of th
DEVELOPMENT REPORT - Need to Dig a Well? Start HereBy Gary Garriott Broadcast: Monday, May 15, 2006 This is Shep O'Neal with the VOA Special English Development Report. There are several low-cost ways
33 阿波罗登月计划(三) DATE=4-25-01 TITLE=EXPLORATIONS #1949 - PROJECT APOLLO, PART 3 TYPE=SPECIAL ENGLISH FEATURE BYLINE=MARILYN RICE CHRISTIANO ANNCR: EXPLORATIONS -- A PROGRAM IN SPECIAL
We are rediscovering the enigmas(谜团) of the Moon and they're really in our own backyard Dr Jim Garvin, Nasa Goddard Space Flight Center Moon water has world in a twitter A surprising amount of water has been found to exist in the Moon's soil. Data
I think food is such a great subject, such an interesting subject. I mean, food is something that everyone has to do. It's a life necessity, and actually because of that it can be a real hassle, like when you have to eat when you're hungry but you re
Plants in the Deserts Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts. Close to streambeds, cottonwoods can sometimes be found. Though these st