X线吸收效率最低的增感屏是()
A.钨酸钙
B.硫氧化镧
C.溴氧化镧
D.硫氧化钆
E.氟氯化钡
参考答案:A
Children are often full of __________ and they take great interest in everything.
A.concern
B.purpose
C.curiosity
D.strength
漂浮在空气中的高速涡轮机产生的雾化颗粒可传播
A.乙型肝炎、艾滋病
B.感冒、结核
C.伤寒、痢疾
D.单纯疱疹、带状疱疹
E.化脓性感染