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【单选题】
相对标准差表示的:A.
回收率
B.
准确度
C.
精密度
D.
纯净度
E.
限度
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皮皮学刷刷变学霸
举一反三
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【单选题】Dolly wants to cycle round the world and she is really keen the idea．
A.
on
B.
for
C.
at
D.
with
【单选题】—It’s amazing that an Australian girl sailed round the world alone in about 200 days. —That’s an inspiring story. Her courage is really _______.
A.
unbearable
B.
independent
C.
admirable
D.
enthusiastic
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A.
people can't go round the earth in a few hours
B.
the American X-43A airplane traveled round the earth in a few hours
C.
the American X-43A airplane is the fastest one in the world
D.
only Americans can make such a fast plane
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