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【单选题】
水泥抗压强度以一组三个棱柱体上得到的6个抗压强度测定值的算术平均值作为试验结果。如果6个测定值中有一个超出它们平均值的（ ），就应剔除这个结果，而以剩下5个值的平均值作为结果。如果五个测定值中再有超过它们平均值（ ）的，则此组结果作废。A.
± 5% ，± 5%
B.
± 10% ，± 10%
C.
± 10% ，± 5%
D.
±15%，±10%
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皮皮学刷刷变学霸
举一反三
【单选题】What is the key to the shark's swift locomotion in water?
A.
The skin.
B.
The tail.
C.
The muscle.
D.
Thejaw.
【单选题】Locomotion is a slow and stupid business until you have eyes to guide you, and eyes are useless if you cannot engage in locomotion, so perception and action evolved together in an arms race.
A.
a powered railway vehicle used for pulling trains
B.
movement or the ability to move from one place to another
C.
a word or phrase, especially with regard to style or idiom
D.
a large and mainly tropical grasshopper with strong powers of flight
【单选题】Bacterial locomotion is accomplished by
A.
Fimbria
B.
Flagella
C.
Cytoskeleton
D.
Both a and b
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