皮皮学，免费搜题
登录
搜题
【多选题】
充分灌溉条件下,常采用以下几种方法来确定灌溉制度()。A.
总结群众丰产灌水经验
B.
根据灌溉试验资料制定灌溉制度
C.
按水量平衡原理分析制定作物灌溉制度
D.
根据天气预报的降水量多少制定
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】如图 所示 , 质量为 m 的物体用平行于斜面的细线联结置于光滑的斜面上,若斜面向左方作加速运动,当物体刚脱离斜面时,它的加速度的大小为
A.
gsin
B.
gcos
C.
gtan
D.
gcot
【简答题】In those days even bicycles were very dear and hard to ______, and coupons were issued for them.
【简答题】And even graves themselves soon ______back into the soil.
【单选题】Some people say that if the holder of chopsticks pushes them______ his stomach to even them up instead of tapping them on the table, the chances are he is a coolie.
A.
on
B.
against
C.
at
D.
to
【单选题】Every minute is made full _____ of _____ our lessons well.
A.
to use; study
B.
use; studying
C.
use; to study
D.
used; studying
【单选题】Much to her delight, three _________ neighbors showed up and several of them even brought with them some candies and cookies.
A.
dozens
B.
dozen
C.
dozen of
D.
dozens of
【单选题】如图所示,质量为m的物体用平行于斜面的细线连接置于光滑的斜面上,若斜面向右方作加速运动,当物体刚脱离斜面时,它的加速度的大小为( )
A.
;
B.
;
C.
;
D.
。
相关题目：