平面锉削的方法有哪几种?

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问题:

平面锉削的方法有哪几种?

考点:电力生产“1000个为什么”化学运行与检修化学运行与检修题库
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从事生产、经营的纳税人应当按照国家有关规定,持税务登记证件,在银行或者其他金融机构开立基本存款账户和其他存款账户,并将其全部账号向税务机关报告。( )

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Sometimes people call each other "freaked-cat", but have you ever thought about this expression? When a cat is frightened, its heart starts beating faster, its muscles get tense, and there are changes in the chemicals in its bloodstream.Although the cat doesn't realize this, its body is getting ready for action.If the danger continues, the animal will do one of two things.It will defend itself, or it will run away as fast as it can.

Something like this also happens to people.When we are excited, angry, scared, or aroused by other emotions (feelings), our bodies go through many physical changes.Our hearts beat faster, and our muscles get tense.All of these changes make us more alert and ready to react.We, too.get ready to defend ourselves or run.

Human beings, however, have a problem that animals never face.If we give way to our feelings and let them take over, we can get into trouble.Have you ever said something in anger —or hit somebody—and regretted it later? Have you ever shouted at a teacher, told somebody you were lonely, or said you were in love, and then wished later you had kept your mouth shut?

It isn't always clever to express your feelings freely.

Does this mean that it's smarter always to hide our feelings? No! If you keep feelings of anger, sadness, and bitterness hidden away or bottled up inside, your body stays tense.Physical illness can develop.It can actually be bad for your health.(It isn't good to keep pleasant feelings inside either; all feelings need to be expressed.)

Feelings that you keep all bottled up inside don't just go away.It's as if you bought some bananas and stuck them in a cupboard.You might not be able to see them.but before long you' d smell them.And if you opened the cupboard, chances are that you'd see little fruit flies flying all over them.They'd be rotten.

You can try to treat emotions as if they were bananas in the cupboard.You can hide them and you can pretend they don't exist, but they'll still be around.And at last you'll have to deal with them.just like those bananas.

小题1:The best title for this article is_____.

A.Emotions Affect Our Bodies

B.What Happens to A Frightened Cat

C.What Happens to An Excited Person

D.Feelings That People Have小题2:What does the word "freaked" mean in the first sentence?

A.excited

B.scared

C.angry

D.shocked小题3:According to the passage, we may conclude that we human beings_____.

A.have fewer problems than animals

B.have the same problems as animals

C.have more problems than animals

D.have cleverer problems than animals小题4:If you hold in your feelings,_____.

A.gradually they'll disappear

B.they won't exist any more

C.they will fly all over

D.your body stays tense小题5:The author wrote this article in order to_____.

A.tell us that it isn't good to keep feelings inside

B.give us some advice on how to express our feelings

C.make us face the problem that we have to deal with feelings

D.make us know that it isn't always wise to express our feelings freely

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橄榄油中的脂肪酸主要为()。

A.三酰甘油

B.必需脂肪酸

C.卵磷脂

D.饱和脂肪酸

E.单不饱和脂肪酸

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晚期胃癌转移到肝脏、肺、胰、骨骼最可能为()

A.直接蔓延

B.淋巴结转移

C.血行转移

D.种植转移

E.呼吸道转移

题型:问答题 简答题

真空严密性试验的时间应连续进行3min,且每分钟压降速度小于等于()认为该试验合格。

A.250Pa

B.300Pa

C.350Pa

D.400Pa

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