使用一次性用品属于
A.个人防护 B.无菌术 C.表面消毒 D.器械消毒 E.废物处理
参考答案:B
I soon found that the work I was doing had already been done by someone else.________, I was
wasting my time. [ ]
A. In other words
B. In a word
C. First of all
D. Believe it or not
与十进制数1023等值的十六进制数为______。
A.3FDH
B.3FFH
C.2FDH
D.3EFH