【单选题】患者男,38岁。因肺部感染来院,医嘱行青阶霉素皮试。皮试3分钟后惠者突然出现呼
A.
难,脉搏细弱,面色苍白,意识丧失。护土应立即采取的措施是
【简答题】实验室常用下列装置制取有关气体. 请回答下列问题: (1)写出编号仪器的名称:①______ ②______③______④______ (2)用KMnO 4 固体来制取O 2 ,应选用上图中的______装置(填A或B).该发生装置还可以做我们学过的碳酸氢铵、铜绿分解实验,用写出这两个反应的文字表达式:______、______. (3)C装置可用来测量生成的CO 2 气体的体积,其中在水面上放...
【单选题】听力原文:W: David! Can I give you a hand with one of those grocery bags? M: Sure, Nancy! Could you take this one, please? I didn't realize how heavy these bags would be. W: Why did you buy so much stuff w...
A.
Get a ride home with Nancy.
C.
Go to the store before it closes.
D.
Carry his groceries home.
【简答题】物质的运动是在 和 中进行的。物质运动必须以 和 为条件。
【单选题】听力原文:W: David, can I give you a hand with one of those grocery bags? M: Sure, Nancy. Could you take this one, please? I didn't realize how heavy these bags would be. W: Why did you buy so much stuff w...
A.
Get a ride home with Nancy.
B.
Go to the store before it closes.
D.
Carry his groceries home.
【简答题】(第二章)表面活性剂溶于水形成正吸附达到饱和后,表面活性剂分子即转入溶液内部,因其两亲性致使表面活性剂分子亲油基团之间相互吸引、缔合形成_______。
【简答题】在实验室里制取氧气的研究中,有下列仪器可供选用(铁架台、导管、橡皮塞等已省略) (1)写出下列编号仪器的名称:①______; ②______; ③______. (2)在实验室里制取氧气,你选用的药品是______,其反应的化学方程式为______. (3)根据你选用的药品,设计一套制取氧气的发生装置,你选择的仪器是(填编号)______. (4)检查你所设计的装置气密性的方法是______. ...
【单选题】患者男,38岁。因肺部感染来院,医嘱行青霉素皮