X线上,在心膈角发现团状阴影,最常见的是()
A.支气管肺炎
B.心包脂肪垫
C.麻疹肺炎
D.心包囊肿
E.心包憩室
参考答案:B
A: How many oranges do we need?
B: Let me _______. Three. [ ]
A. think
B. think of
C. think over
D. think out
与浓硫酸反应显蓝色的是
A.丹参醌ⅡA B.丹参醌ⅡB C.丹参醌ⅠD.丹参素甲 E.隐丹参醌