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【多选题】
下面( )措施不能减弱偶然误差对观测成果的影响。A.
提高仪器的精度等级
B.
对同一量进行多次重复的观测，取其平均值
C.
增加观测次数，进行多余观测
D.
求改正数，对观测结果进行改正
E.
采用适当的观测方法，使偶然误差相互抵消
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反馈参考答案：
举一反三
【单选题】听下面一段独白，回答第17至20题。 What was the woman’s job ten years ago?
A.
Adirector in a company．
B.
Acollege teacher．
C.
Awriter．
【简答题】阅读理解。 Komal loved playing baseball very much. She always wanted to be a baseball player in her school team. She practiced nearly every day, even on rainy days. Her grandfather lived in another city....
【简答题】听下面一段独白,回答第 17 至第 20 题。
【单选题】听下面一段独白,回答第 17 至第 20 四个小题。 17. What is the talk mainly about?
A.
The history of the school.
B.
The courses for the term.
C.
The plan for the day.
【单选题】听下面一段独白,回答第 17 至第 20 四个小题。 17. What did the speaker do in Spain?
A.
He visited his Spanish friends.
B.
He attended a meeting.
C.
He went sightseeing.
【单选题】GLSL内置函数中,表示对数据进行截断,也即限定结果在某个范围中(比如[0,1])的是:
A.
distance
B.
mix
C.
clamp
D.
normalize
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