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【简答题】
什 么 是系 统误 差?系 统误 差可分 哪 几 类 ?系 统误 差有 哪 些 检验 方法?如何 减 小和消除系 统误 差?
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举一反三
【单选题】— Could you tell me ______ when he grows up? — He says he wants to be a painter. [ ]
A.
what Peter wanted to be
B.
what does Peter want to be
C.
what Peter wants to be
【单选题】I need to write down what he says. Could you give me some _______?
A.
paper
B.
planes
C.
pets
【单选题】Mr. Bright says, “How about you?” He could also use ____.
A.
Where are you?
B.
What about you?
C.
How are you?
D.
Are you from America?
【单选题】When someone says “Could you tell me how to keep fit?”, you may say_________.
A.
I suggest you go on a diet.
B.
You should eat less greasy food.
C.
Follow my advice and take more exercise.
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