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问题 单项选择题 配伍题

主要有氧化发酵管可应用于非发酵菌，也可用于气单胞菌等一部分发酵型细菌的鉴定（）

A.Micro－ID系统

B.API系统

C.Minitek系统

D.肠杆菌－MB12E系统

E.氧化发酵鉴定系统

答案

参考答案：E

单项选择题

A first-grade teacher use ten flash cards, numbered 1 through 10, to teach her students to order numbers correctly. She has students choose four flash cards randomly, then arrange the cards in ascending order. One day, she removes the cards numbered "2" and "4" from the deck of flash cards. On that day, how many different correct arrangements of four randomly selected cards are possible ？（）

A.70

B.210

C.336

D.840

E.1，680
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选择题

北宋与南宋的关系类似于[ ]

A、西晋与东晋   

B、西周与东周    

C、西汉与东汉      

D、北魏与东魏
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