显微镜放大倍数是____的放大倍数与____的放大倍数的乘积,其中____安装在镜筒的上端,____安装在转换器上。
目镜;物镜;目镜;物镜
亚硝酸盐中毒的特效解毒剂()
A.乙酰胺注射液
B.亚甲蓝(美蓝)
C.维生素K
D.胆碱酯酶复能剂
E.巯基络合剂
he has little knowledge, the old worker has a lot of experience. [ ]
A. Although.
B. Because.
C. If