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【单选题】
奶 牛每天所吃的东西，包括了 20%的精饲料、16%的青贮、9%的辅料和 5%的苜蓿，除此之 外，它们还会喝大量的水，水的占比最大可以达到多少。
A.
0.5
B.
0.3
C.
0.2
D.
0.6
参考答案：
参考解析：
刷刷题刷刷变学霸
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.