下列关于预测的说法,不对的是()。
A.预测总会有误差的
B.远期预测更准确
C.预测误差是预测值与实际值的差
D.对一组产品的预测要比对单一产品的预测更准确
参考答案:B
句型转换。
1. I don't know where I can find my money. (同义句转化)
I don't know where ______ _______ my money.
2. This is my watch. (同义句转换)
This watch is _______.
3. I heard the girls singing on the playground. (对划线部分提问)
_______ _______ you hear singing on the playground?
散装货船与矿砂船较多采用的内底边板结构形式是:()
A.下倾式
B.上倾式
C.水平式
D.曲折式