题目

Some people will do just about anything to save money. And I am one of them. Take my family’s last vacation. It was my six-year-old son’s winter break from school, and we were heading home from Fort Lauderdale after a weeklong trip. The flight was overbooked, and Delta, the airline, offered us $400 per person in credits to give up our seats and leave the next day. I had meetings in New York, so I had to get back. But that didn’t mean my husband and my son couldn’t stay. I took my nine-month-old and took off for home. The next day, my husband and son were offered more credits t 下列叙述错误的是 [　　] A．培养乳酸菌时需要在培养基中添加维生素 B．培养霉菌时需将培养基的pH调至碱性 C．培养细菌时需将培养基的pH调至中性或微碱性 D．培养厌氧微生物时需要提供无氧的条件