皮皮学,免费搜题
登录
搜题
【多选题】
药物鉴别试验选择的原则
A.
方法应符合线性与范围
B.
尽可能采用药典已有收载的方法
C.
要有一定的专属性、灵敏性和简便性
D.
一般选用2~4种不同类型的方法,化学法与仪器法相结合
E.
原料药应侧重于具有指纹性的光谱法,制剂应侧重于抗干扰的专属性色 谱方法
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】Which of the following is NOT included as one of Padilla's targets for terrorist attack?
A.
New York City.
B.
Washington.
C.
Florida.
D.
Chicago.
【单选题】According to the passage,which of the following is NOT the way to defend terrorist attacks?
A.
Improving human intelligence and patrol.
B.
Alerting police and citizens to terrorism
C.
Finding out terrorists before they attack.
D.
Studying the response to past attacks.
【单选题】1999年诺贝尔化学奖获得者艾哈迈德·泽维尔(Ahmed.Zewail),开创了“飞秒(10 -15 S)化学”的新领域,使运用激光光谱技术观测化学反应时分子中原子的运动成为可能。你认为该技术不能观察到的是……( )
A.
化学变化中反应物分子的分解
B.
化学反应中原子的运动
C.
化学变化中生成物分子的形成
D.
原子核的内部结构
【单选题】病人发生急性肺水肿时,应取
A.
左侧卧位,头低脚高
B.
左侧卧位,头高脚低
C.
右侧卧位,头高脚低
D.
端坐位,双腿下垂
E.
抬高头胸20°~30°
【单选题】The head of homeland security indicated that ______.
A.
the worry about terrorist attack was totally unnecessary
B.
the government had been well prepared for possible security problem
C.
the government had been too optimistic about its anti-terrorism efforts
D.
the legislators usually could do nothing except making empty talks
【简答题】2000年10月10日瑞典皇家科学院宣布了2000年诺贝尔化学奖获得者,他们是美国的黑格、马克迪亚米德和日本的白川英树,他们的重要贡献是发现了导电塑料及对该领域的开创性研究。他们的研究表明:要使塑料导电,必须进行掺杂,即在材料中移去电子(如加入碘分子)或加入电子(如加入金属钠)。若加入2.3 g Na,则其含有________mol电子,能给其他物质提供_____________mol电子。
【单选题】不符合理想防晒剂性能的是()
A.
颜色浅,安全性高对皮肤无刺激、无毒性、无过敏性和光敏性
B.
在阳光线下易分解,自身稳定性差
C.
防晒效果好,成本降低
D.
不与生物成分结合
【简答题】科学家发现,细胞膜中存在着某种只允许水分子出入的通道----水通道.右图是2003年诺贝尔化学奖获得者彼得?阿格雷公布的世界上第一张水通道蛋白的示意图. (1)右图水通道中的每个“ ”表示: ①______;②______. (2)根据示意图,由于水通道中间的正电荷对H + 离子有______作用,所以,H + 离子不能通过该水通道.
【单选题】Which of the following statement is true about the terrorist attack?
A.
It is a deadly bombing in Germany last night and is considered by the government as a right-wing terrorist attack.
B.
Eleven people were found dead at two hookah bars outside Frankfurt.
C.
The suspect escaped after the attack and the police has not found him yet.
D.
According to media reports, the victims in the bars were from Germany's Turkish and Kurdish communities.
【单选题】A strike. B) orest fire. D) A terrorist attack.
A.
A strike.
B.
A storm.
C.
A forest fire.
D.
A terrorist attack.
相关题目: