某化合物[tex=0.786x1.0]XUo+oVq0EXNG7rY4rJKp8w==[/tex]的分子式为[tex=4.786x1.214]Ixqj8Fgi0ShYA5cQcJ+gMIAFkL+R2U37Pj9hJiqFd9l/aYSD7O71tNubv4uDo24XvX2lKCC2449VokNarXjHww==[/tex], [tex=0.786x1.0]LZDt+1VNvVbb/r8yj5htzw==[/tex]与羟胺和苯肼均无反应, [tex=0.786x1.0]XUo+oVq0EXNG7rY4rJKp8w==[/tex]的[tex=1.143x1.0]+e6E+bquJ1wzP1J+4MVqLQ==[/tex]光谱在[tex=7.571x1.214]3i9eJ6P/061ktQvKCXXH0UD5DlAhdfSgbHNnG4kIfeaGvNY8qFurC3uppTlYd9m8[/tex]区域有吸收峰, 而在[tex=4.214x1.214]hEKlIlZ5VwGCbd+1MAUl8Hp2+rwRC+K1F8jcW6TAaKY=[/tex]以上区域无吸收峰,另外一个较强的吸收峰在 [tex=4.214x1.214]NjFtCGkxmjSLGM8fh7zwNhwB+Vfgi5+Ew1caAuWZdwc=[/tex] 、 [tex=0.786x1.0]XUo+oVq0EXNG7rY4rJKp8w==[/tex]的[tex=3.714x1.214]stccn7i5O7z196n3ARMRGasIm6b2dmZ2kziHOBZlRAo=[/tex]谱在[tex=4.643x1.357]X+v65w8zOPjlGcy4X4g1ChKrjQ78ZoqN15l9ri0p6NI=[/tex]、三重峰; [tex=4.571x1.357]dodpdx55RhJIkvYuo1COMYXqIq20VIoRcRUI/6RylWc=[/tex], 双峰; [tex=1.286x1.0]agseBWw+81vd6UTNcHbDiA==[/tex][tex=1.286x1.0]4rJpCSSw453Ss8oUDCm3jw==[/tex][tex=2.143x1.357]wWYaalYlNvsmpzJuTGLL1w==[/tex]多峰; [tex=4.643x1.357]mXJjzGegEM6mtcvJBC9uJXYI3jHBPaqdOVOuH2b/VKE=[/tex]三重峰; [tex=4.643x1.357]/1ud8L9x1qh8LSiLlmNL3BFCKYrDb2l8WmQrb512B4o=[/tex]多重峰, 推测[tex=0.786x1.0]XUo+oVq0EXNG7rY4rJKp8w==[/tex]的构造式。
举一反三
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- 6个顶点11条边的所有非同构的连通的简单非平面图有[tex=2.143x2.429]iP+B62/T05A6ZTM0eeaWiQ==[/tex]个,其中有[tex=2.143x2.429]ndZSw3zT0QTOVLVdoUto1Q==[/tex]个含子图[tex=1.786x1.286]J+vVZa2YaMpc6mJBbqVvWw==[/tex],有[tex=2.143x2.429]lmhx48evnQMhi03NovPXig==[/tex]个含与[tex=1.214x1.214]kFXZ1uR8GjycbJx+Ts2kyQ==[/tex]同胚的子图。供选择的答案[tex=3.071x1.214]3KinXFh3SXhZ7nIe1y9KEV6aadxhhJWeEy6Dij1iObdMUZkY6ZA5J2dVVjPSuhEf[/tex]:(1) 1 ;(2) 2 ;(3) 3 ; (4) 4 ;(5) 5 ;(6) 6 ; (7) 7 ; (8) 8 。
- >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
- 判断下列命题是否为真:(1)[tex=3.643x1.357]/5abqJjwKZ1qr+6hsVFF5EBvfq3ggOFNlHMClz0h9nk=[/tex](2)[tex=2.929x1.357]rGJpyjIjJpbcoBTWxP0Jiw==[/tex](3)[tex=4.5x1.357]2wycHMoqU83MyEp17iBils58bR7YLuCTI2G9NVAdlfY=[/tex](4)[tex=5.214x1.357]CTz2gu+IIm1GgNmYMGaduCRtA41wnW4WqwRWwEhq6aA=[/tex](5)[tex=4.857x1.357]1DcE2BMMOaZhTuxR/mjgsboXxfg5ET59Dp4I/jjEDuw=[/tex](6)[tex=4.643x1.357]BSryrsQYOvTP2hTWRu6t4nAuJwlSs4L9jaq70EpB+Us=[/tex](7)若[tex=6.0x1.357]y0IZLUnBO88nR8WBZYvd7QXv5S1OMINV5cQNzPyiyAc=[/tex],则[tex=3.429x1.357]1brfPwTkVVIX4GfoMIUskA==[/tex](8)若[tex=7.643x1.357]MhLfJXZnhbXiB0x3oNtFzThV4Y1mJxe1VYr7PkJE/T6hmTD3WWp+UxbNwvUQ6DHk[/tex],则[tex=4.143x1.357]LZUA94ISo1po5HWsOVeBCjo0rMvj7uw3bGw5HiZenrI=[/tex]
- 对 [tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]的不同值,分别求出循环群[tex=1.143x1.214]StMMJ6qThnpokZJIPGrdFyP3vrLnUdltYxmLxjw8za8=[/tex]的所有生成元和所有子群。(1) 7; (2) 8; (3)10 ;(4) 14 ; (5) 15 (6) 18 。