许多清热药发挥抗细菌内毒素作用的主要机制是()
A.中和内毒素
B.解热
C.提高机体对内毒素的耐受力
D.抑制内毒素的释放
E.抑制机体免疫功能
参考答案:C
目镜选取为10倍,物镜选取为40倍,那么显微镜的放大倍数为( )
A.50倍
B.200倍
C.400倍
D.1000倍
—Why are you so happy?
— Jim says I am clever. ______ has ever told me that before. [ ]
A. Anybody
B. Somebody
C. Nobody
D. Everybody