下列哪种药物是抗结核的首选药物()
A.链霉素(SM)
B.异烟肼(NH)
C.利福平(RFP)
D.乙硫异烟胺(ETH)
E.吡嗪酰胺(PZA.
参考答案:B
Tom was made ________ his own clothes by his mother.[ ]
A. wash
B. washed
C. washing
D. to wash
某浮头式换热器型号为FB600-110-25-4,其型号意义是什么?