寒邪内阻腹痛的主要特点是（） ["腹部胀痛，攻窜不定","腹痛绵绵，时痛时止","饥则痛甚，得温稍减","腹痛急暴，得温痛减","腹部刺痛，痛处不移"]
普通型带式输送机倾斜角度不允许超过（）。 ["18°","4°","20°"]
胃穿孔的特征性X线表现是（） ["胃泡增大","膈下游离气体","肠腔内液平面","两侧膈肌升高","肠管扩张"]
油冷滚筒加油时，油位为滚筒直径（）高度。 ["1/3","1/2","2/3","3/4"]
下列哪项不是眩晕瘀血阻窍证的主要症状（） ["头痛固定","唇舌紫暗","舌有瘀斑","面色少华","脉象细涩"]
过饱和固溶体的脱溶
