【单选题】Why are slow-speed diesel engines especially tall?
A.
Because in this way the piston can be withdrawn downwards
B.
Because the engine can occupy larger spar
C.
Because the engine may have long strokes which improve engine efficiency.
D.
Because more maintenance is provided.
【单选题】Why are slow-speed diesel engines especially tall?
A.
Because in this way the piston can be withdrawn downwards.
B.
Because the engine can occupy larger space.
C.
Because the engine may have long strokes which improve engine efficiency.
D.
Because more maintenance is provided.
【单选题】患儿男,10个月,发热、咳嗽、气喘4~5天,近2天腹泻大便3~4次/日,呈黄稀便,偶有呕吐,体检两肺可闻喘鸣音及湿性啰音,心音有力,心律齐,心率136次/分,腹软,肝肋下2cm,质软,脾不大患儿在治疗中突然喘憋加重,烦躁不安、发绀,体温38℃,呼吸70次/分,心率180次/分,心音低钝,肝右季肋下4.5cm,尿少,应考虑是()。
【单选题】注射剂药液配制过程中风险主要来自于( )。
【单选题】下列各项中,不属于辅助生产费用分配方法的是?
【单选题】—The Internet service fees are too high,and the speed is too slow. —That's why Premier Li Keqiang asks operators(运营商)to provide Internet.
A.
many cheaper and quicker
B.
very cheaper and quicker
C.
more cheaper and quicker
D.
much cheaper and quicker
【单选题】虫草钩蝠蛾的卵刚产下时为( )色,产后1~2h变为黑色。
【单选题】(1~3 题共用题干) 患儿,4 个月,因惊厥 5 分钟来院急诊。 患儿牛奶喂养医.未加辅食,近日流涕,好哭闹,不咳嗽, 查 体: 体温 37.8 °C,双眼上翻,面肌颤动,面色发绀。 四肢抖动,两肺痰鸣音,前囟平软,2cm×2cm,布 鲁金斯基征(-),枕部有乒乓球感。 1、该患儿最可能的诊断是