【判断题】不变投入是指在短期内不会随产出数量变化的投入。( )
【单选题】We should realize that we can only achieve our goal if we are prepared to __ and learn from failure.
【简答题】I am very lucky today to be a real eye opener.
【简答题】If your prices are favorable, we are prepared to order the beans ______ large quantity.