注浆成型用石膏模的吸水性能越好,则成坯速度越快。

题型:判断题

问题:

注浆成型用石膏模的吸水性能越好,则成坯速度越快。

考点:化学工程陶瓷工艺学陶瓷工艺学题库
题型:判断题

已知f(x)是R上的奇函数,当x<0时,f(x)=log2(-x),则f(x)的解析式为______.

题型:判断题

下列有关NaHCO3和Na2CO3性质的比较中,正确的是(  )

A.热稳定性:Na2CO3<NaHCO3

B.常温时在水中的溶解度:Na2CO3<NaHCO3

C.等质量的NaHCO3和Na2CO3与足量稀盐酸反应产生CO2的量:Na2CO3<NaHCO3

D.等物质的量的NaHCO3和Na2CO3与足量稀盐酸反应,NaHCO3放出的CO2

题型:判断题

阅读理解。

     Honesty comes in many forms. First there's self-honesty. Is what people see the real article or do you

appear through smoke and mirrors? I find that if I try to be something I'm not. I feel unsure of myself and

take out a part from my PBA (personal bank account). I love how singer Judy Garland put it. "Always be

a first-class version(版本) of yourself, instead of a second-class version of somebody else."

     Then there's honesty in our actions. Are you honest at school, with your parents, and with your boss?

If you've ever been dishonest, I think we all have, try being honest, and notice how whole it makes you

feel. Remember, you can't do wrong and feel right. This story by Jeff is a good example of that:

     In my second year of study, there were three kids in my math class who didn't do well. I was really good

at it. I would charge them three dollars for each test that I helped them pass. I'd write on a little piece of

paper all the right answers, and hand them off.

     At first I felt like I was making money, kind of a nice job. I wasn't thinking about how it could hurt all

of us. After a while I realized I shouldn't do that anymore, because I wasn't really helping them. They weren't

learning anything, and it would only get harder down the road. Cheating certainly wasn't helping me.

     It takes courage to be honest when people all around you are getting away with cheating on tests, lying

to their parents, and stealing at work. But, remember, every act of honesty is a deposit (储蓄) into your PBA

and will build strength.

1. The underlined part "appear through smoke and mirrors" in the first paragraph means "_____".

A. to be honest

B. to be unreal

C. to become clear

D. to come from an imagined world

2. Which of the following can best explain Judy Garland's words?

A. Be your true self rather than follow others.

B. Don't copy others or you can't be the first class.

C. Make efforts to be the first instead of the second.

D. Don't learn from others unless they're excellent.

3. What does the author expect to show by Jeff's story?

A. Honesty the author expect to show by Jeff's story?

B. A bad thing can be turned into a good one.

C. Helping others cheat can do good to nobody.

D. One should realize the wrong in his bad deeds.

4. In the last paragraph the author mainly wants to express _____.

A. one must be brave to be honest

B. it's difficult to be honest when others are not

C. one should be honest when making a deposit

D. honesty in one's actions can help him in the future

题型:判断题

十一届全国人大三次会议通过了关于修改选举法的规定,我国城乡居民首次实现( )。

A.等额选举
B.同票同权
C.差额选举
D.直接选举

题型:判断题

具有典型的“逗号”状包裹体的宝石为()

A.红宝石

B.祖母绿

C.橄榄石

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