【单选题】患者男性, 25岁, 十二指肠溃疡 患者,突然发生呕吐,所吐物为昨天吃的食物。引发原因是
【单选题】Under her administration claim the critics,______ high-rise construction has destroyed the character of the city's downtown darkening its streets and driving business.
【单选题】患者男性,25岁。上腹灼痛,反酸,疼痛多出现在早上10点及下午4点左右,有时夜间痛醒,进食后缓解。x线钡餐检查:十二指肠溃疡。 该患者首选的治疗药物是
【单选题】对三角形进行5次等精度观测,其闭合差为:+4′′;-3′′;+1′′;-2′′;+6′′,则该组观测值的精度( )。
【单选题】以下对于临边防护的说法错误的是()。
A.
基坑周边,尚未安装栏杆或栏板的阳台、料台与挑平台周边,雨篷与挑檐边,无外脚手的屋面与楼层周边及水箱与水塔周边等处,都必须设置防护栏杆
B.
分层施工的楼梯口和梯段边,必须安装临时护栏。顶层楼梯口无需安装防护栏杆
C.
各种垂直运输接料平台,除两侧设防护栏杆外,平台口还应设置安全门或活动防护栏杆
D.
当临边的外侧面临街道时,除防护栏杆外,敞口立面必须采取满挂安全网或其他可靠措施作全封闭处理
【单选题】基坑、楼层、屋面、阳台周边等临边应设 。
【单选题】Its critics claim that when advertising ____ the elasticity of demand, firms are able to ____.
A.
decreases; lower their advertising budget
B.
increases; become more competitive
C.
increases; increase their advertising budget
D.
decreases; charge a larger mark-up over marginal cost