某组态的光谱支项为3D3,3D2,3D1;1D2,这些光谱支项能级顺序为A. 3D3>3D2>3D1> 1D2 B. 3D1> 3D3>1D2>3D2 C. 3D2>3D1>3D3> 1D2 D. 1D2>3D3>3D2>3D1 A: 3D3>3D2>3D1> 1D2 B: 3D1> 3D3>1D2>3D2 C: 3D1> 3D3>1D2>3D2 D: 1D2>3D3>3D2>3D1
某组态的光谱支项为3D3,3D2,3D1;1D2,这些光谱支项能级顺序为A. 3D3>3D2>3D1> 1D2 B. 3D1> 3D3>1D2>3D2 C. 3D2>3D1>3D3> 1D2 D. 1D2>3D3>3D2>3D1 A: 3D3>3D2>3D1> 1D2 B: 3D1> 3D3>1D2>3D2 C: 3D1> 3D3>1D2>3D2 D: 1D2>3D3>3D2>3D1
偶函数y=f(x)在(-∞,0)上单调递增,则有( ) A: f(-3)>f(π)>f(-3π) B: f(π)>f(-3)>f(-3π) C: f(-3π)>f(-3)>f(π) D: f(-3)>f(-3π)>f(π)
偶函数y=f(x)在(-∞,0)上单调递增,则有( ) A: f(-3)>f(π)>f(-3π) B: f(π)>f(-3)>f(-3π) C: f(-3π)>f(-3)>f(π) D: f(-3)>f(-3π)>f(π)
执行下列语句后的显示结果是什么? >>> from math import sqrt >>> print sqrt(3)*sqrt(3) == 3 A: 3 B: True C: False D: sqrt(3)*sqrt(3) == 3
执行下列语句后的显示结果是什么? >>> from math import sqrt >>> print sqrt(3)*sqrt(3) == 3 A: 3 B: True C: False D: sqrt(3)*sqrt(3) == 3
下面化合物的熔点高低次序是:( ) A: (1)>(3)>(2) B: (3)>(2)>(1) C: (1)>(2)>(3) D: (3)>(1)>(2)
下面化合物的熔点高低次序是:( ) A: (1)>(3)>(2) B: (3)>(2)>(1) C: (1)>(2)>(3) D: (3)>(1)>(2)
执行下列语句后的显示结果是(<br/>)<br/>>>>from math<br/>import sqrt<br/>>>>print(sqrt(3)*sqrt(3)==3) A: 3 B: True C: False D: sqrt(3)*sqrt(3)==3
执行下列语句后的显示结果是(<br/>)<br/>>>>from math<br/>import sqrt<br/>>>>print(sqrt(3)*sqrt(3)==3) A: 3 B: True C: False D: sqrt(3)*sqrt(3)==3
下列碳正离子的稳定性顺序是:( ) A: (1) > (2) > (3) > (4) B: (2) > (4) > (3) > (1) C: (1) > (3) > (2) > (4) D: (2) > (4) > (1) > (3)
下列碳正离子的稳定性顺序是:( ) A: (1) > (2) > (3) > (4) B: (2) > (4) > (3) > (1) C: (1) > (3) > (2) > (4) D: (2) > (4) > (1) > (3)
(1)环丁酮,(2)环戊酮,(3)3-戊酮在用氢化物还原时,活性次序为: A: (3)>(1)>(2) B: (3)>(2)>(1) C: (2)>(1)>(3) D: (1)>(2)>(3)
(1)环丁酮,(2)环戊酮,(3)3-戊酮在用氢化物还原时,活性次序为: A: (3)>(1)>(2) B: (3)>(2)>(1) C: (2)>(1)>(3) D: (1)>(2)>(3)
下列化合物按碱性由强到弱排列的次序为()。(1) CH3CH2ONa (2) (CH3)3CCH2ONa (3) CF3CH2ONa A: (1)>(2)>(3) B: (3)>(1)>(2) C: (2)>(1)>(3) D: (1)>(3)>(2)
下列化合物按碱性由强到弱排列的次序为()。(1) CH3CH2ONa (2) (CH3)3CCH2ONa (3) CF3CH2ONa A: (1)>(2)>(3) B: (3)>(1)>(2) C: (2)>(1)>(3) D: (1)>(3)>(2)
比较下列化合物的碱性强弱(1)脲(2)乙酰胺(3)乙胺(4)丙二酰脲 A: (1)>(2)>(3)>(4) B: (2)>(4)>(3)>(1) C: (3)>(1)>(2)>(4) D: (4)>(2)>(3)>(1)
比较下列化合物的碱性强弱(1)脲(2)乙酰胺(3)乙胺(4)丙二酰脲 A: (1)>(2)>(3)>(4) B: (2)>(4)>(3)>(1) C: (3)>(1)>(2)>(4) D: (4)>(2)>(3)>(1)
下列物质(1) CaO;(2) MgO;(3) NH3;(4) PH3熔点由高到低的顺序为:( ) A: (1) > (2) > (3) > (4) B: (1) > (2 ) > (4 ) > (3) C: (2) > (1) > (4) > (3) D: (2 ) > (1) > (3 ) > (4 )
下列物质(1) CaO;(2) MgO;(3) NH3;(4) PH3熔点由高到低的顺序为:( ) A: (1) > (2) > (3) > (4) B: (1) > (2 ) > (4 ) > (3) C: (2) > (1) > (4) > (3) D: (2 ) > (1) > (3 ) > (4 )