第8题: [单项选择]段的集合称为()。 A. extent B. segment C. tablespace D. database 参考答案:C
第9题: [单项选择]嗜血杆菌分离培养时,需要V因子是因为它是() A. 高铁血红素 B. 脱氢酶的辅酶 C. 过氧化氢酶的辅基 D. 细胞色素氧化酶的辅基 E. 触酶的辅基 参考答案:B 答案解析:X因子是对热稳定的物质,是一种含铁的卟啉,是细菌合成过氧化氢酶、细菌色素氧化酶、过氧化物酶的辅基;V因子是对热不稳定的维生素B类物质,是一种脱氢酶的辅基酶。
第16题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. He’ll be speaking at the end of the meeting. B. He suddenly decided not to speak. C. He was supposed to speak last night instead. D. He already spoke very briefly tonight. 参考答案:C 答案解析:[听力原文]
W: Wasn’t Carl supposed to give a speech tonight
M: Yes, but he backed out at the last min