Rotational transitions of DCO[SUP+] in vibrationally excited states were measured in the region 360-440 GHz. The states investigated are: 0 2 0 (with l = 0,2), 0 3 0 (with l = 1,3), 0 4 0 (with l = 0,2,4), 0 1[SUB1],1, and 1 0[SUB0],0. This study allowed us ...
解答:解:连接BC,∵AB∥CD,∴∠ABO+∠CBO+∠BCO+∠OCD=180°,而∠CBO+∠BCO+∠0=180°,∴∠0=∠ABO+∠DCO=60°+α.故填空答案:60+α.点评:本题用到的知识点为:三角形的内角和是180°以及平行线的性质:两直线平行,同旁内角互补. 练习册系列答案 ...