TLSO是指（） ["颈胸矫形器","胸矫形器","胸腰矫形器","胸腰骶矫形器","腰骶矫形器"]
X线表现的严重程度与患者的无明显临床症状不相称，为下述何种肿瘤骨转移的特征（） ["A.乳癌骨转移","B.甲状腺癌骨转移","C.前列腺癌骨转移","D.鼻咽癌骨转移","E.肾癌骨转移"]
制作前牙固定桥增力桥架时，龈端应距离牙龈约（） ["3.0mm","2.5mm","2.0mm","1.5mm","1.0mm"]
制作前牙固定桥增力桥架时，切端应短于人工牙切端（） ["0.5～0.9mm","1.0～1.5mm","2.0～3.mm","3.5～4mm","4.5～5mm"]
下列哪项临床表现对诊断骨髓瘤最有价值（） ["A.50岁以上的男性","B.全身性疼痛","C.尿中出现本周蛋白","D.进行性贫血","E.血清钙及球蛋白升高"]
沙尘暴是指强风从地面卷起大量沙尘，使空气浑浊，水平能见度小于（）的灾害性天气现象。
