写出对苯醌与下列试剂反应的主要产物。[tex=3.643x1.214]zYK7uY7Wm6LPcv+N4U3VTo+ppdayVnnEvA8v0OaDkwU=[/tex],干醚,然后[tex=2.5x1.357]x7AleR+Bkqmd9yrbJNsOKMjyFUzzRnPu9Yyc/Q4x6tc=[/tex]
举一反三
- 写出丁二酸酐与下列试剂反应的主要产物。[tex=4.5x1.214]EeypT8jJBwid2keNdWDFAOelLUyT3EF7oEn6W2Qi8xJUqWZG3kkW7ViiTiEXjAfm[/tex],干醚,然后[tex=2.5x1.357]x7AleR+Bkqmd9yrbJNsOKMjyFUzzRnPu9Yyc/Q4x6tc=[/tex]
- 写出正丙醇与下列试剂反应的主要产物。[tex=3.643x1.214]zYK7uY7Wm6LPcv+N4U3VTo+ppdayVnnEvA8v0OaDkwU=[/tex]
- 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}
- 若要将一个长度为N=16的序列x(n)重新位倒序,作为某一FFT算法的输入,则位倒序后序列的样本序号为( )。 A: x(15), x(14), x(13), x(12), x(11), x(10), x(9), x(8), x(7), x(6),<br/>x(5), x(4), x(3), x(2), x(1), x(0) B: x(0), x(4), x(2), x(6), x(1), x(5), x(3), x(7), x(8), x(12), x(10),<br/>x(14), x(9), x(13), x(11), x(15) C: x(0), x(2), x(4), x(6), x(8), x(10), x(12), x(14), x(1), x(3), x(5),<br/>x(7), x(9), x(11), x(13), x(15) D: x(0), x(8), x(4), x(12), x(2), x(10), x(6), x(14), x(1), x(9), x(5),<br/>x(13), x(3), x(11), x(7), x(15)
- 假设“☆”是一种新的运算,若3☆2=3×4,6☆3=6×7×8,x☆4=840(x>0),那么x等于: A: 2 B: 3 C: 4 D: 5 E: 6 F: 7 G: 8 H: 9