50多年来,人类派出的深空探测器拜访了太阳系中的（ ）颗行星,并且在火星、金星、土卫六上实现了软着陆.

The development of CAD/CAD can be traced back to 1950.Up to now,there has been more than 50 years of history.After going through the stages of the primary application,general application,rapid development,mature standardization,conglomeration,injection of artificial intellegence,network.Even now,they are still developing further into many directions.The application scope of CAD/CAM has become wider and reached more people.CAD/CAM is one of the most important tools for manufacturing and has a great contribution to the advancement of human manufacturing industry.

新航路的开辟也叫地理大发现

5阶段.不过我们现在普遍使用的是4代计算机

Our company is one of the major silk production, management of all varieties of silk cloth has been 50 years.Product quality, exquisite technology, home and abroad.
To make you a general understanding of our products, special illustrated catalog of a separate post.If any are interested in a product, please let us know.Upon receipt of your specific inquiry, we will be happy to send you samples and quotations.
Look forward to your early reply.
希望帮到你 ^^

翻译见附件,

（1）干旱、半干旱；距海远近
（2）选①、选②或③，理由：该区域自然植被为草原和荒漠；森林生态耗水量远大于草原（森林单位土地面积上的叶片总面积与生长速度大于草本植物），过量植物会加重区域旱情；种草或自然恢复较植树造林更符合自然规律，且投入较少。

（1）干旱、半干旱距海远近
（2）选①、选②或③；理由：该区域自然植被为草原和荒漠，森林生态耗水量远大于草原（森林单位土地面积上的叶片总面积与生长速度大于草本植物），过量植树，会加重区域旱情，种草或自然恢复较植树造林更符合自然规律，且投入较少。

甲午中日战争

D,郑和下西洋要比迪亚士发现好望角早57年.

The store has 50 years of history,with products in perfect workmanship .

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