白内障超声乳化术的适应症是
A.棕色白内障B.过熟期白内障C.后囊下白内障D.30岁以上晶体半脱位和晶体脱位者E.Morgagnian白内障
参考答案:C
I like the food very much. It is ______. [ ]
A. awful
B. expensive
C. friendly
D. delicious
空气调节区围护结构的最大传热系数与______有关。
A.围护结构类别
B.空气调节类别
C.室温允许波动范围
D.窗墙比