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【多选题】
苜蓿的产量主要取决于每次刈割时
A.
单位面积的密度
B.
植株的平均高度
C.
单株分枝数
D.
植株的再生性
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举一反三
【单选题】In many places water is becoming scarcer. Treating it as a right makes the scarcity worse. Ideally, efficient water use would be encouraged by charging for it, but attempts to do so have mostly proved...
A.
People should only be entitled to certain amount of water free.
B.
People can borrow water from their neighbors when necessary.
C.
People are free to bargain for water in market in their daily lives.
D.
People have the right to trade water to raise water productivity.
【单选题】非抢先式实时操作系统的实时性取决于（）
A.
中断响应时间
B.
最长任务执行时间
C.
任务切换时间
D.
所有其它任务执行时间之和
相关题目：
【单选题】In many places water is becoming scarcer. Treating it as a right makes the scarcity worse. Ideally, efficient water use would be encouraged by charging for it, but attempts to do so have mostly proved...
A.
People should only be entitled to certain amount of water free.
B.
People can borrow water from their neighbors when necessary.
C.
People are free to bargain for water in market in their daily lives.
D.
People have the right to trade water to raise water productivity.
【单选题】非抢先式实时操作系统的实时性取决于（）
A.
中断响应时间
B.
最长任务执行时间
C.
任务切换时间
D.
所有其它任务执行时间之和
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