实际生产中,分体制造的大型砂芯可用易熔合金将其各部分连接在一起。

题型:判断题

问题:

实际生产中,分体制造的大型砂芯可用易熔合金将其各部分连接在一起。

考点:机械铸造工考试机械铸造初级工考试机械铸造初级工考试题库
题型:判断题

解放思想与实事求是的关系是______

A.相互依存的关系
B.解放思想决定实事求是
C.统一的关系
D.对立统一的关系

题型:判断题

在钢筋混凝土中,合理配置钢筋的基本原则是()。

A.钢筋受力能力与混凝土一致 

B.钢筋受拉能力与混凝土抗压能力相应 

C.钢筋置于受压区 

D.钢筋置于梁、板上部

题型:判断题

阅读理解。

     You might say that one reason Barack Obama is the President of the US is because he knows how to

give a good speech. In 2004, when Massachusetts Senator(参议员) John Kerry was the Democratic

Party’s nominee(被提名者) for the presidency, a little-known senator from Illinois gave the keynote

speech at the Democratic National Convention. That senator was Obama. It was a remarkable speech -- poetic, and inspiring. The people who heard it would remember it for a long time. 

     Since 2004, Obama has written and delivered thousands of speeches. These are usually praised for

two reasons: he treats the audiences like intelligent adults, and he is able to express complicated ideas in

an easy, natural way. Before becoming president, Obama was a lawyer, a college professor, and a

successful writer -- his two memoirs(回忆录) have become best-sellers. The skills he needed to succeed

in his previous jobs have also contributed to his success as a speechmaker.

     Writing team: Obama has a team of people who write his speeches. The writers chat with Obama for

hours about what he wants to say. They listen to recordings of past presidential addresses and seek advice from advisers. Obama usually edits and rewrites the drafts several times.

     Obama’s tricks for a lighthearted speech that stays on message:

     Make fun of the guests. Obama starts his speech by gently teasing his guests. His opening lines grab the audience’s attention while giving them an opportunity to relax and laugh at themselves and each other.

     Make fun of yourself. A good rule for speechmakers: If you’re going to make a joke about someone

else, be sure to make one about yourself, too. Obama mocks his own poor choices for filling the position

of Commerce Secretary, saying, "No President in history has ever named three Commerce Secretaries this quickly.”

1. Obama made the poetic and inspiring speech in 2004 as________.

A. president              

B. a nominee for the presidency

C. a senator              

D. a secretary

2. What’s the meaning of the underlined word in paragraph 2?

A. Difficult to understand.      

B. Easy to understand.

C. Different from others        

D. Interesting to say.

3. According to the passage, we know that before becoming president, _________.

A. Obama was once a lawyer, a doctor and a college professor.

B. Obama was a successful writer.

C. Obama’s three memoirs have become best-sellers.

D. Obama’s former jobs have nothing to do with his speech.

4. According to paragraph 3, we know that _________.

A. Obama writes his speech himself.

B. the writers chat with Obama only for minutes before writing.

C. the writers never listen to recordings of past presidential speeches.

D. Obama is serious with his speech.

5. What’s the best title of the passage?

A. Secret of Obama’s successful speeches.  

B. Obama’s successful speeches.

C. Obama’s way of making speeches.      

D. Problems of Obama’s speeches.

题型:判断题

工业合成氨的反应N2+3H2= 2NH3的能量变化如下图所示,请回答有关问题:

(1).合成 1 mol NH3(l) ____________(填“吸收”、“放出”)_____________kJ的热量。

(2).已知:拆开 lmol H—H 键、lmol N-H 键、lmol N≡N 键分别需要的能量是436kJ、391kJ、946kJ。则上图中的a=_______________kJ;1 mol N2(g) 完全反应生成NH3(g)产生的能量变化为     ______KJ。

(3).推测反应 2NH3(l)= N2(g)+3H2(g) 比反应 2NH3 (g)= N2(g)+3H2(g)______________(填“吸收”、“放出”)的热量_____________(填“多”、“少”)。

题型:判断题

80286在保护模式下的虚拟空间大小以及实际地址空间大小分别是( )。

A.1GB、32MB

B.16MB、2MB

C.1GB、16MB

D.16MB、1MB

更多题库