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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】若分别购买100kg大米、10kg苹果、1kg巧克力,精确测量后发现三种商品都缺少约0.5kg。一般会公认巧克力缺少最严重,以上事例应用的主要概念是( )
A.
系统误差
B.
随机误差
C.
绝对误差
D.
相对误差
【单选题】One day a poor man was cutting a tree near a river. Suddenly his old axe(斧子) fell in-to the water. He felt very sad because he lost his only axe. Then a fairy (tiller) came out and asked him what was ...
A.
He fell into the river.
B.
He lost his axe.
C.
His axe fell into the river.