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【单选题】
关于偏差,下列说法错误的是A.
平均偏差都是正值
B.
相对平均偏差都是正值
C.
标准偏差有与测定值相同的单位
D.
相对平均偏差有与测定值相同的单位
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【单选题】Chinese green tea called Tieguanyin, which costs $3, 000 per ________, approximately $15 for a single cup.
A.
kilo
B.
memo
C.
auto
D.
ad
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【简答题】成牙本质细胞浆突的末端膨大形成的结构是： A釉丛 B釉板 C釉梭 D釉柱 E施雷格线
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【单选题】Generally, it is believed that the （ ）tea ware is the good choice for brewing the half-fermented tea, such as Dahongpao and Tieguanyin.
A.
boccaro
B.
glass
C.
pottery
D.
porcelain
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