“烤蓝”是一种常用的铁器表面处理方法,可在铁器表面生成一层致密的四氧化三铁膜,增

题型:选择题

问题:

“烤蓝”是一种常用的铁器表面处理方法,可在铁器表面生成一层致密的四氧化三铁膜,增强铁器的抗腐蚀能力。其中常用的一种方法是采用发蓝溶液(如一种配方为:硝酸钠50-100克、氢氧化钠600-700 克、亚硝酸钠100-200克、水1000克)。下列说法不正确的是[ ]

A.未作“烤蓝”和其他防腐蚀处理的铁器在空气中易发生电化学腐蚀

B.“烤蓝”后的铁器不易生锈

C.“烤蓝”过程中发生了氧化还原反应

D.“烤蓝”时铁作氧化剂

考点:金属的表面防护
题型:选择题

在下列疾病中哪些患者应禁用苯海索()

A.肝功能不全

B.肾功能不全

C.心律失常

D.癫痫

E.前列腺肥大

题型:选择题
阅读下面短文,掌握其大意.然后从1—15各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。
A land free from destruction(毁灭,破坏), plus wealth, natural resources, and labor supply ——  all these were important 1      in helping England to become the center for the Industrial Revolution. 2       they were not enough. Something else was needed to start the industrial process. That "something special" was men —— 3      individuals who could invent machines, find new 4      of power, and establish business organizations to reshape society. The men who created the machines of the Industrial Revolution 5     from many backgrounds and many occupations. Many of them were 6       inventors than scientists. A man who is a pure scientist is primarily interested in doing his research 7       .He is not necessarily working 8      that his findings can be used. An inventor or one interested in applied science is all trying to make something that has a concrete use. He may try to solve a problem by 9       the theories 10       science or by experimenting through trial and error. Regardless of his method, he is working to obtain a  11      result: the construction of a harvesting machine, the burning of a light bulb(灯泡), or one of 12      other objectives. Most of the people who 13       the machines of the Industrial Revolution were inventors, not trained scientists. A few were both scientists and inventors. Even those who had little or no training in science might not have made their inventions 14      a groundwork had not been laid by scientists years 15     .
小题1:
A.cases B.reasons C.factors D.situations
小题2:
A.But B.And C.Besides D.Even
小题3:
A.generating B.effective C.motivating D.creative
小题4:
A.origins B.sources C.bases D.discoveries
小题5:
A.came B.arrived C.stemmed D.appeared
小题6:
A.less B.better C.more D.worse
小题7:
A.happily B.occasionally C.reluctantly D.accurately
小题8:
A.now B.and C.all D.so
小题9:
A.planning B.using C.idea D.means
小题10:
A.of B.with C.to D.as
小题11:
A.single B.sole C.specialized D.specific
小题12:
A.few B.those C.many D.all
小题13:
A.proposed B.developed C.supplied D.offered
小题14:
A.as B.if C.because D.while
小题15:
A.ago B.past C.ahead D.before
题型:选择题

下列重要事件中其推论不符合史实的是

选项史实结论
A15世纪末16世纪初,新航路的开辟世界日益成为联系紧密的整体
B19世纪中后期工业革命深入开展资本主义世界市场初步形成
C第二次工业革命,生产和资本高度集中形成垄断大企业
D苏联高度集中的计划经济体制建立导致第二次世界大战的爆发

题型:选择题

下列各项中,与女子胞的功能关系最为密切的是()

A.心、肝、脾、冲脉、督脉

B.心、肾、冲脉、任脉、督脉

C.心、肺、肾、阳明脉、带脉

D.心、脾、冲脉、任脉、带脉

E.心、肝、脾、肾、冲脉、任脉

题型:选择题

短途货物运价是指运距在( )的运价。

A.25千米以下(含25千米)
B.30千米以下(含30千米)
C.20千米以下(含20千米)
D.35千米以下(含35千米)

更多题库