下列FIC指数表示拮抗作用的为
A．＜0.5
B．0.5～1
C．1～2
D．＞2
E．＜1
参考答案：D
解析： 本题考查FIC的定义。分级抑菌浓度(fractional inhibitory concentration，FIC)指数小于0.5时，两种药为协同作用；当FIC指数为0.5～1时，两种药为相加作用；当FIC指数大于1且小于2时，两种药为无关作用；当FIC指数大于2时，两种药为拮抗作用。
The sun is shining and it’s very hot. 31 many people don’t want to go out after 32 . Mrs. West has to(不得不) 33 her father at the airport. Her father doesn’t feel well, he wants to see a 34 in the city hospital. Now she’s 35 in the street. There 36 no trees and she feels very 37 . But she’s too 38 and can’t walk fast(快). Suddenly she finds(发现) a 39 walking behind her. She gets angry and her face turns red. “Why are you walking 40 me, boy?” She asks strictly. “It’s cooler”. The boy answers.
|