季风水田区的水稻种植业主要特点有?
季风水田区的水稻种植业主要特点有?
数学人气:981 ℃时间:2020-02-03 07:34:56
优质解答
1.小农经营 1.单位面积产量高,但商品率低 3.机械化和科技水平比较低 4.水利工程量大
我来回答
类似推荐
猜你喜欢
- 1比五分之二多十五分之二的数是多少?
- 2一个分数,分子与分母之和是30,如果分子加3,分母加31,得到新分数约分后是1/3,原来的分数是多少?
- 3Hi Mary.Here's a letter ___you.Who is it___?
- 4教室的英文This is my classroom,which is a nice big room.The windows are big and the walls are whi
- 5夏天的野外,晓明要防止鲜牛奶高温变质,他手中只有毛巾、矿泉水、饭盒、书包等物品,请你利用所学的知识帮他设计一个“土冰箱”来使鲜奶保鲜.
- 6翻译:Usually people show great sympathy for the children begging in the streets.
- 7谁知道苏教版六年级要背哪些古诗(古诗书里六年级,课外的除外)
- 8① ( )When do you usually get ______school every day?A to B at C / ② ( )pleae write and tell
- 9Have you make a ______ for your holiday?A.disition B.plan 哪个更好?
- 10初三数学题(a-3/2a-4)/[(5/a-2)-a-2],其中a=根号3-3