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【简答题】
谈论自己对母体、样本、位置特征数、离散特征数的认识 2. 谈论数值修约的注意事项 3. 356.***按照数值修约原则修约到356.5的上下限是多少? 4. 6.**** 按照数值修约原则修约到6.4的上下限是多少?
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举一反三
【简答题】信息是经过加工处理并对人类社会实践和生产活动产生决策影响的 。
【简答题】According to The Mental Health Foundation, why do people commit random acts of kindness?
【单选题】What is the implication of the words on the bus wall?
A.
All small acts will add up to kindness.
B.
It's a small act to help a person in need.
C.
Everyone can play his own part to make things better.
D.
You should be kind to your neighbors and they will treat you the same way.
【单选题】Judging from the context, 'Practice random kindness and senseless acts of beauty.' (line 2, para. 2) means______.
A.
do some unplanned good deeds
B.
appreciate kind acts and anything beautiful
C.
offer your kindness to some people in particular
D.
be aware of others' kind-heartedness
【简答题】用戴维南定理求解 电路,已知 U S =12V, R 1 =8Ω, R 2 =2Ω, R 3 =6Ω , R 4 =3Ω ,Is=3A,求 R 4 上的电压 U 的值 为( )V。
【简答题】已知电路如图a所示，U S =8V，R 1 =R 2 =R 3 =2Ω，R 4 =1Ω，试用戴维南定理求解R 4 中电流I。
【简答题】已知电路如图a所示，U S1 =9V，R 1 =3Ω，R 2 =6Ω，R 3 =4Ω，试用戴维南定理求解I。
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