如何存放挖掘机?

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问题:

如何存放挖掘机?

考点:挖掘机司机考试挖掘机司机考试题库
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机械波在介质中传播时,下列说法中正确的是(   ).

A.各质点都在各自的平衡位置附近振动

B.相邻质点间必自相互作用力

C.前一质点的振动带动相邻后一质点的振动,后一质点的振动必定落后于前一质点

D.各质点也随波的传播而迁移

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法国人克雷夫克夫在18世纪70年代写道:“我可以给你之初一个家庭……他的妻子是荷兰人,儿子和法国人结婚,生了四个孩子,都娶了不同国籍的妻子……这是把所有国家的各个个人熔化成一个新的民族。”他所描绘的现象最有可能发生在

A.英属北美殖民地

B.法属美洲殖民地

C.西属美洲殖民地

D.荷属美洲殖民地

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51 .  It has been used as a product full of nutrition. Our bodies need it for their development and also to help them to recover after a disease.

The microelement(微量元素) content of honey is similar to that of our blood. 52_    In honey, the percentage of vitamins and minerals differs according to the kind of nectar(花蜜) used by the bees and the quality of the soil where the plants grow.  53 . The latter is the most valuable in its healing(治疗)-effects.

54 .  Put one teaspoonful of honey in a glass of milk before going to bed and you will certainly have sweet dreams that night.

If you feel sick because you have eaten too much one day, or you have stomachache, then their solution is a glass of water with honey and lemon. Moreover, a sore throat is not a problem any more if you have a cup of tea with honey.

Singers use honey when they have problems with their voices or before a concert when they really feel exhausted.  55 :  they use them for their hair, nails and bodies.

A.Honey is mostly used as a natural sedative(镇静剂)when you have problems with your sleep.

B.Honey is helpful for losing weight.

C.That is why it is so well assimilated(吸收)by our bodies.

D.For women, beauty products made of honey can be very helpfulE.      Honey, a wonderful gift of nature to mankind, has been well known since ancient times.

F.      What determine the quality of honey is the kind of bees and flowers.

G.     There are kinds of honey, including mono flower honey, meaning the honey is made of only one type of flower, and polo flower honey, which is made in mountainous areas.

1-5 BDACB 6-10 BBBDD 11- 15 CAACB

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能有效控制绿脓杆菌感染的药物是()。

A.四环素 

B.利巴韦林 

C.妥布霉素 

D.氟康唑 

E.林可霉素

题型:问答题 简答题

“长曲棍球”雷达成像卫星可全天候全天时实时侦察,地面分辨率可达()米

A.10

B.5

C.1

D.0.1

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