①加强对市场的监管
②增强依法纳税意识
③依法规范征税行为
④依法自觉诚信纳税
A:①②
B:①③
C:②④
D:③④
—I'm trying to keep my cool because we've been together ________ three years.
如图所示是奥斯特实验的示意图.接通电路后观察到的现象是____,由此实验得到的结论是____ .如果移走小磁针,该结论____ (选填“成立”或“不成立”).