[单选题]男性，7岁，6小时前由货车上跌下，伤后即有呼吸困难，并逐渐加重。入院查体：脉搏130次/分，血压10.7/6.7kPa，呼吸22次/分，颜面发绀，吸气性呼吸困难，颈上胸部有皮下气肿，气管向左移位，右侧呼吸音消失。急救措施是
A.立即输血补液抗休克
B.抗休克同时开胸探查
C.胸腔闭式引流排气减压
D.大量吸氧
E.呼吸机辅助呼吸

[单选题]C4植物光合作用固定CO2形成的第一个产物是（　　）。
A.琥珀酸
B.草酰乙酸
C.苹果酸
D.天冬氨酸

[单项选择]空车时车辆本身的构造重量，称之为（），以吨为单位
A. 载重
B. 自重
C. 荷重
D. 轴重

[判断题]使用中发生卡链情况，应将重物放下后方可检修。
A.正确
B.错误

[单选题]SFZ-10000/110表示三相自然循环风冷有载调压,额定容量为()kVA,高压绕组额定电压110kV电力变压器。
A.10000
B.36500
C.8000

[单项选择]Every year more than half a million American kids have drainage(排泄) tubes surgically implanted in their ears to combat persistent infections. The procedure, known as tympanostomy, may not be as (62) as the tonsillectomy was in the 1940s, but it now (63) as the nation’s leading childhood (64) and a new study suggests it’s being vastly overused. In (65) more than 6,000 scheduled ear tube operations, a team of experts (66) by Harvard pediatrician Lawrence Kleinman found that fewer than half were clearly justified. "Each year", the researchers write in the current Journal of the American Medical Association (JAMA), "several hundred thousand children in the United States may be (67) tympanostomy tubes that offer them no demonstrated (68) ...and may place them at increased (69) ."
Tube placement isn’t a (70) risky procedure, but it costs $1,000 to $1,500 and sometimes scars the eardrum, causing a partial loss of (71)