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【多选题】
下列关于导热数值计算问题的说法正确的是( )。A.
数值求解导热问题的关键是区域离散和方程离散。
B.
向前差分和差分的截断误差均为一阶。
C.
系数矩阵主对角占优是常物性导热问题所组成的差分方程组迭代过程收敛的必要条件。
D.
一维平板非稳态导热的显式格式离散方程在任何条件下都是稳定的。
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举一反三
【单选题】If f and g are distinct prime numbers less than 10, which of the following cannot be the product of f and g?
A.
6
B.
9
C.
10
D.
14
E.
15
【简答题】Numbers are very important in our life. Now we use numbers every day. Numbers are______important in our life______we use them every day.
【单选题】numbers = range(-5,5) f = filter(lambda x:x>0,numbers) print(list(f))
A.
[1, 2, 3, 4,5]
B.
[-5,-4,-3,-2,-1,1, 2, 3, 4,5]
C.
[1, 2, 3, 4,]
D.
[-4,-3,-2,-1,1, 2, 3, 4]
【多选题】What information going with numbers should be interpreted to convey the meaning of numbers?
A.
Unit of numbers
B.
What numbers refer to
C.
Certain trends that numbers may indicate
D.
No option here. Please choose among A, B and C.
【简答题】Between 2000 and 2001 both countries had similar numbers of employees, but by 2002 numbers in England had fallen to half as many as in Germany.
【简答题】What is the value of the greater of two numbers if one of the numbers is three times the smaller number? (1) One of the numbers is 12. (2) The sum of the two numbers is 16.
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