The respirable dust is defined by those particles≤()μm size range
A. 44
B. 10
C. 70
D. 2
数组运算的快捷键是()
A. Ctrl+Shift+Alter
B. Ctrl+Shift+Enter
Ctrl+Shift+Home
D. Ctrl+Shift+End
女,52岁。右上腹阵法性绞痛伴右肩背部放射痛,B超发现胆囊增大,胆囊壁增厚,胆囊内有结石光团和声影。其治疗原则是()
A. 胆囊切除
B. 胆囊造瘘
C. 抗炎
D. 胆总管切开
E. 禁食