塑性挤出

题型:名词解释

问题:

塑性挤出

考点:工程地质工程地质综合练习工程地质综合练习题库
题型:名词解释

30岁男患,体检抗-HAV IgG阳性,肝功正常,既往无患甲型肝炎病史,也未曾注射甲肝疫苗,考虑是()

A.继发感染

B.隐性感染

C.显性感染

D.潜伏性感染

E.病原携带状态

题型:名词解释

德国化学家凯库勒认为:苯分子是由6个碳原子以单双键相互交替结合而成的环状结构。为了验证凯库勒有关苯环的观点,甲同学设计了如下实验方案。

① 按如图所示的装置图连接好各仪器;

②检验装置的气密性;

③在A中加入适量的苯和液溴的混合液体,再加入少量铁粉,塞上橡皮塞,打开止水夹K1、K2、K3

④待C中烧瓶收集满气体后,将导管b的下端插入烧杯里的水中,挤压预先装有水的胶头滴管的胶头,观察实验现象。

请回答下列问题。

(1)A中所发生反应的反应方程式为_____________________,

能证明凯库勒观点错误的实验现象是_____________________________;

(2)装置B的作用是____________________;

(3)C中烧瓶的容积为500 mL,收集气体时,由于空气未排尽,最终水未充满烧瓶,假设烧瓶中混合气体对H2的相对密度为37.9,则实验结束时,进入烧瓶中的水的体积为________mL(空气的平均相对分子质量为29);

(4)实验前应对A、B、C三个装置的气密性进行逐一检查,则检查装置C气密性的方法为_______________________________________。

题型:名词解释

有人认为,新文化运动是辛亥革命的继续,主要依据是[ ]

A.都有反封建的性质

B.都主张推翻清朝统治

C.都以“民主”“科学”为指导思想

D.都反对文化领域的复古思想

题型:名词解释

党对公安工作的绝对领导是我国公安工作的领导优势。( )

题型:名词解释

The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of (1) and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (2) which is concluded with a well-defined (3) and can be further broken down into (4) -a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (5) logically by nature.

空白(3)处应选择()

A.milestone

B.end-mark

C.measure

D.criteria

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