对某试样进行平行三次测定,得 CaO 平均含量为 30.6% ,而真实含量为 30.3% ,则 30.6%-30.3%=0.3% 为
A.
相对误差
B.
绝对误差
C.
相对偏差
D.
绝对偏差
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【单选题】听力原文:W: What's the difference between a lesson and a lecture? M: Well, they're both ways of imparting knowledge. But the main difference is that you participate in a lesson, whereas you just listen to...
A.
A lesson requires students' active involvement.
B.
Students usually take an active part in a lecture.
C.
More knowledge is covered in a lecture.
D.
There is a larger group of people interested in lessons.