某色谱柱子上,苯和奈的保留时间和半峰宽分别为4.65和7.39 min、0.158和0.228 min;求柱效果和分离度。 A: n(苯)=4.80x10^3 /m, n(萘)=5.82x10^3 /m, R=8.36 B: n(苯)=3.80x10^3 /m, n(萘)=4.80x10^3 /m, R=6.26 C: n(苯)=4.00x10^3 /m, n(萘)=5.00x10^3 /m, R=8.36 D: n(苯)=4.50x10^3 /m, n(萘)=5.23x10^3 /m, R=4.36 E: n(苯)=2.80x10^3 /m, n(萘)=5.35x10^3 /m, R=6.86
某色谱柱子上,苯和奈的保留时间和半峰宽分别为4.65和7.39 min、0.158和0.228 min;求柱效果和分离度。 A: n(苯)=4.80x10^3 /m, n(萘)=5.82x10^3 /m, R=8.36 B: n(苯)=3.80x10^3 /m, n(萘)=4.80x10^3 /m, R=6.26 C: n(苯)=4.00x10^3 /m, n(萘)=5.00x10^3 /m, R=8.36 D: n(苯)=4.50x10^3 /m, n(萘)=5.23x10^3 /m, R=4.36 E: n(苯)=2.80x10^3 /m, n(萘)=5.35x10^3 /m, R=6.86
设有如下三个关系表: R A m n S B C 1 3 T A B C m 1 3 m 1 3 下列操作中正确的是( )。 A: A) T=R∩S B: B) T=R∪S C: C) T=R×S D: D) T=R/S
设有如下三个关系表: R A m n S B C 1 3 T A B C m 1 3 m 1 3 下列操作中正确的是( )。 A: A) T=R∩S B: B) T=R∪S C: C) T=R×S D: D) T=R/S
【单选题】求图中力系的合力FR及其作用位置() A. F R = 8 kN , 作用点距 A 为 3/5 m 向上 B. F R = 8 kN , 作用点距 A 为 3/5 m 向下 C. F R = 8 kN , 作用点距 A 为 5/3 m 向上 D. F R = 8 kN , 作用点距 A 为 5/3 m 向下
【单选题】求图中力系的合力FR及其作用位置() A. F R = 8 kN , 作用点距 A 为 3/5 m 向上 B. F R = 8 kN , 作用点距 A 为 3/5 m 向下 C. F R = 8 kN , 作用点距 A 为 5/3 m 向上 D. F R = 8 kN , 作用点距 A 为 5/3 m 向下
设A为m×n矩阵,B为n×m矩阵,且m>n,令r(AB)=r,则( )。 A: r>m B: r=m C: r<m D: r≥m
设A为m×n矩阵,B为n×m矩阵,且m>n,令r(AB)=r,则( )。 A: r>m B: r=m C: r<m D: r≥m
求图示作用在梁上的分布力系合力的大小及作用位置(矩A支座的距离AC)?[img=1066x576]1802f3fde2639bd.png[/img] A: R=31.5 kN, AC=2.6 m B: R=24.75 kN, AC=3 m C: R=24.75 kN, AC=2.6 m D: R=31.5 kN, AC=3 m
求图示作用在梁上的分布力系合力的大小及作用位置(矩A支座的距离AC)?[img=1066x576]1802f3fde2639bd.png[/img] A: R=31.5 kN, AC=2.6 m B: R=24.75 kN, AC=3 m C: R=24.75 kN, AC=2.6 m D: R=31.5 kN, AC=3 m
设m=9,则( )为绝对值最小余数。 A: r=-5,-4,-3,-2,-1,0,1,2,3 B: r=-4,-3,-2,-1,0,1,2,3,4 C: r=-3,-2,-1,0,1,2,3,4,5 D: 以上都不对
设m=9,则( )为绝对值最小余数。 A: r=-5,-4,-3,-2,-1,0,1,2,3 B: r=-4,-3,-2,-1,0,1,2,3,4 C: r=-3,-2,-1,0,1,2,3,4,5 D: 以上都不对
求给定自然数m和n的最大公约数。请完善程序。 Private Sub Command1_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r Do r = m Mod n m = n n = r Loop Until__________ Text3.Text = m End Sub Private Sub Command2_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r r = m Mod n Do Until _______ m = n n = r r = m Mod n Loop Text3.Text =____ End Sub Private Sub Command3_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r Do r = m Mod n m = n n = r Loop While________ Text3.Text =______ End Sub Private Sub Command4_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r r = m Mod n Do While______ m = n n = r r = m Mod n Loop Text3.Text =____ End Sube73f1fd63959cc8362d8c82d419c2353.png
求给定自然数m和n的最大公约数。请完善程序。 Private Sub Command1_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r Do r = m Mod n m = n n = r Loop Until__________ Text3.Text = m End Sub Private Sub Command2_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r r = m Mod n Do Until _______ m = n n = r r = m Mod n Loop Text3.Text =____ End Sub Private Sub Command3_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r Do r = m Mod n m = n n = r Loop While________ Text3.Text =______ End Sub Private Sub Command4_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r r = m Mod n Do While______ m = n n = r r = m Mod n Loop Text3.Text =____ End Sube73f1fd63959cc8362d8c82d419c2353.png
18.某系统中有n个并发进程,有同类资源R共m个,假设每个进程对资源R的最大需求是w,则可能发生死锁的情况是( )。 A: m=5,n=3,w=2 B: m=2,n=3,w=1 C: m=4,n=3,w=2 D: m=6,n=3,w=3
18.某系统中有n个并发进程,有同类资源R共m个,假设每个进程对资源R的最大需求是w,则可能发生死锁的情况是( )。 A: m=5,n=3,w=2 B: m=2,n=3,w=1 C: m=4,n=3,w=2 D: m=6,n=3,w=3
设A是m×n矩阵,B是n×m矩阵,E为m阶单位矩阵,若AB=E,则()。 A: r(A)=m,r(B)=m B: r(A)=m,r(B)=n C: r(A)=n,r(B)=m D: r(A)=n,r(B)=n
设A是m×n矩阵,B是n×m矩阵,E为m阶单位矩阵,若AB=E,则()。 A: r(A)=m,r(B)=m B: r(A)=m,r(B)=n C: r(A)=n,r(B)=m D: r(A)=n,r(B)=n
设A为m×n矩阵,B为n×m矩阵,E为m阶单位矩阵,若AB=E,则(). A: r(A)=m,r(B)=m B: r(A)=m,r(B)=n C: r(A)=n,r(B)=m D: r(A)=n,r(B)=n
设A为m×n矩阵,B为n×m矩阵,E为m阶单位矩阵,若AB=E,则(). A: r(A)=m,r(B)=m B: r(A)=m,r(B)=n C: r(A)=n,r(B)=m D: r(A)=n,r(B)=n