Originally posted by ndmmxiaomayi:plough?
[b]Question 1
In the 4th millennium B.C., the invention that marked the beginning of agricultural civilization was a device drawn by oxen. Name this device.[/b]
CorrectOriginally posted by poon cho tang:plough?
Originally posted by ndmmxiaomayi:terracing..
[b]Question 15
What is the name for the soil conservation technique by which farmers plow sideways across hillsides instead of up and down the slopes?[/b]
Virtual prize. No real prizes.Originally posted by yuko-ogura:ans liao can get prize?
Originally posted by ndmmxiaomayi:Virtual prize. No real prizes.
Originally posted by ndmmxiaomayi:Answer A and final
[b]Question 4
What fuel can be produced by fermenting sugar cane, sawdust, corn, or wood chips?
A. peat
B. alcohol
C. uranium
D. kerosene
E. hydrogen[/b]