题目

It is important that you make a good impression at work. If you make a good impression on your boss, he or she is more likely to give you more responsibilities which can lead to promotions (晋级) and raises. Here are some ways to make a good impression at work. Use Proper Office Etiquette (礼仪) Using proper manners will help you make a good impression on your boss and also your co-workers. Office etiquette includes everything from the proper way to e-mails to knowing when, where, and how to use your cell phone at work. Face up to Your Mistakes When you make a mistake at work, whi在下列三个反应中：①SO2+2NaOH=Na2SO3+H2O②SO2+2H2S=3S↓+2H2O③SO2+Cl2+2H2O=H2SO4+2HCl二氧化硫所起的作用是（　　）A．相同B．不同C．均是氧化剂的作用D．均是还原剂作用