【单选题】听力原文:M: Hello Peggy. Why are you going through all those newspapers? W: Hello David. I'm trying to find a flat and I've gone through all these advertisements, but I can't fred anything good. M: Do you...
A.
She is trying to find a flight number in the advertisements in the newspapers.
B.
She is trying to find a flat in the advertisements in the newspapers.
C.
She is trying to find a film in the advertisements in the newspapers.
D.
She is trying to find a funny article in the newspapers.
【单选题】某医生观察某新药对预防流感的效果如下 下列说法最合适的是
A.
服药组的发病率低于未服药组发病率,可以认为该药有效
B.
由于两组发病率相差不大,不能认为该药预防流感有效
【单选题】男性病人,37岁。右胸被刀刺伤后5分钟,病人有明显呼吸困难,右胸伤口处随呼吸可有气体进出。该病人发生呼吸循环功能紊乱的主要病例机制为
【单选题】关于混凝土后浇带下列说法最合适的是,宜优先采用( )混凝土施工。
【单选题】过量表达 载体构建时采用的策略,下列说法最合适的是( )
A.
35S 启动子 + 野生型基因组 DNA+ 下游终止序列
B.
野生型中该基因的启动子 + 基因组 DNA+ 下游终止序列
【单选题】男性病人, 37 岁。右胸被刀刺伤后 5 分钟,病人有明显呼吸困难,右胸伤口处随呼吸可有气体进出。 该病人发生呼吸循环功能紊乱的主要病理机制为