【单选题】患者男性,30岁,有消化性溃疡病史。突发上腹部剧痛5小时,伴大汗淋漓,烦躁不安,服用制酸剂不能缓解,考虑有溃疡病穿孔的可能。最可靠的检查是
【单选题】. — Were you nervous while being questioned by the police? — Yes, my heart was ____ wildly then.
【单选题】患者男,27岁,既往有消化道溃疡病史4年,突发上腹部刀割样疼痛,迅速蔓延至全腹,服抗生素后不能缓解,症状加重,6h后于急诊求治。经腹部X线平片诊断为:急性弥漫性腹膜炎,消化性溃疡穿孔。急性弥漫性腹膜炎的主要标志是()
【判断题】电源部分不要有抗较强的浪涌电压和尖峰电压的干扰。
【单选题】— What's the model plane look like? — The wings of the plane are ____of its body. [ ]
A.
more than twice the length
B.
twice more than the length
C.
more than the length twice
D.
more twice than the length
【简答题】A.Not as good as it was in 1960. B.Better than it was last year. C.Not very good for graduates. D.Especially good for graduates in liberal arts.
【单选题】下面对射频功率放大电路描述错误的是
B.
多级放大电路的功率增益是各单级放大电路增益之和
C.
在设计多级放大电路时,一般第一级放大电路的增益最高
D.
在多级放大电路中,第一级放大电路的噪声系数对整个放大器的噪声系数影响最大
【单选题】通知车站员工执行紧急疏散程序时,应使用( ),以免引起恐慌。
【单选题】It was reported that the police had developed new ________________ against hi-jackers.