柱塞泵按柱塞的排列方向不同，可分为哪几种类型

发布时间：2017-07-16 06:45 │ 来源：www.tikuol.com

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问题：

柱塞泵按柱塞的排列方向不同，可分为哪几种类型

考点：机械基础技能鉴定考核高级机械技能鉴定全国职工职业技能鉴定考核机械基础高级

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用方框中所给单词的适当形式填空，使短文正确、通顺。每词限用一次。

be paper sail spare enjoy in many coin prefer while

     A hobby is an interesting way of spending your free time. There are so 1________ different hobbies for
different people to choose. Some hobbies are very popular, 2_________ others are quite unusual. You may
choose one that you are interested 3_________. You may enjoy collecting things such as stamps, stones,
foreign 4_________ and so on.
     If you like to work with your hands, you may enjoy model making and 5_________ cutting, which both
need great attention in detail. Or you may 6_________ creative hobbies, like painting and writing. Many people
7_________ outdoor activities to indoor activities. They get great pleasure from 8_________, cycling and so on.
which they can enjoy with others.
     Wherever you live, there 9_________ always a hobby for you to choose. The hobby can help you relax after
your daily work. The hobby can give you many hours of pleasure and make your 10_________ time interesting
and creative. The hobby can bring you happiness, knowledge and friendship.

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2010年11月1日0时开始，我国进行第六次人口普查。下图为近四次人口普查”，回答1~2题。

1．进入2000年，我国面对的主要人口问题是[ ]

A．人口老龄化日趋严重，劳动力严重短缺

B．人口自然增长率偏高，每年新增人口多

C．青壮年人口数量庞大，就业压力大

D．人口呈现低增长，人口数量日趋减少

2．与前几次人口普查相比，现在人口普查难度越来越大，主要原因是我国[ ]

A．人口分布极不平衡

B．人口增长速度仍过快

C．国际间人口迁移过快

D．国内自发性人口迁移过大

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反复

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干燥综合征中最常见的自身抗体______。

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乙醚吸入麻醉前用苯巴比妥的主要目的是（）

A.减少腺体的分泌

B.解除胃平滑肌的痉挛

C.缩短乙醚的诱导期

D.消除病人麻醉前紧张情绪`

E.解除忧虑和减少呕吐的发作

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