能够用于鉴别SO2和CO2两种无色气体的溶液是（ ）
A．品红溶液
B．BaCl2溶液
C．紫色石蕊试液
D．澄清石灰水
答案：A
黑睛骤生多个细小星翳，其形或联缀或团聚，伴有碜涩疼痛、羞明流泪的眼病称（）。【A型题】
A．混睛障
B．圆翳内障
C．椒疮
D．凝脂翳
E．聚星障
Lucy is an girl and her brother is _______. [ ]
A. eight-year-old; ten years old
B. eight years old; ten years old
C. eight-year-old; ten years -old
D. eight-year-old; ten years old
