皮皮学，免费搜题
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【单选题】
If you have some middle school English books to sell, which number can you call?A.
59990345
B.
13977485725
C.
8.74326e+007
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】I have a friend. His name is Jack. ③He is healthy because(因为) he plays sports. He runs every day. He runs to his ___①____ in the morning and he runs ____②____ after school in the afternoon. He can run...
【单选题】以标准正态分布为参照,t分布的特征是?
A.
中心位置偏左，但分布曲线形状相同
B.
中心位置不变，但分布曲线的峰更高
C.
中心位置偏右，但分布曲线形状相同
D.
中心位置不变，但分布曲线的峰更低
【多选题】下列是T分布的特征的有
A.
以0为中心，左右对称的单峰分布
B.
T分布是一簇曲线，其形态变化与自由度的大小有关
C.
自由度越小，T值越分散，曲线越低平
D.
当自由度趋于 时，T分布即为Z分布
【简答题】听对话，选择正确答案。 1. Who often plays with Mary? A. Jack. B. Mike. C. Lucy. 2. How does Ann often go home? A. By bus. B. By car. C. By bike. 3. What does Tom often do on Sunday? A. Look for things on the Int...
【简答题】What extracurricular activities do you usually have at university? What do you benefit from them?
【单选题】What benefit do sports offer to students’physical health?
A.
Students can keep fit.
B.
Students have a higher self-esteem.
C.
students don’t like smoking.
D.
students learn to relieve stress.
【简答题】I like eating fruit and vegetables what are of great benefit to our healthy. Not only do they pr us from falling into ill, but they help us lose weight. I used to hate vegetables, but follow the ...
【简答题】Zhang Yang, David, Jack and Mark are new students. It's Sunday today. They 1 go to school. They are 2 at home. David is from America. He is Zhang Yang's 3 . They are in the same 4 . But they are in di...
【单选题】Jack often plays soccer ______ three o’clock _____ Saturday afternoon..
A.
at, on
B.
at , to
C.
in, at
D.
in, in
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