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斗式提升机的料斗的种类和应用、料斗的安装方式、提升机的卸料方式及应用

答案

参考答案：

（1）料斗的种类和应用：

①深斗：容量大、但卸料困难，用于干燥的、流动性、散落性好的颗粒料的装料

②浅斗：容量小，易卸料、用于输送粉料、潮湿或粘性物料的装料

③尖角斗：用于粘稠性大、沉重的物料的装料

④无底斗：

（2）安装方式：间隔安装，密集安装

（3）提升机的卸料方式及应用：

①离心式卸料：利用离心力卸料，带运行速度要高，用于粒度小干燥的颗卸料

②定向自流式卸料：利用重力卸料，带运行速度低，用于流动性不好的散状、纤维状或潮湿物料

③无定向自流式卸料：用离心力重力卸料，带运行速度较低，用于大块状、比重大和易碎的物料

单项选择题

Are you interested in seeing the beautiful fall foliage of New England but tired of traffic jams and overbooked hotels Then this year forget the crowds in New England and see the beautiful colors of autumn in the Catskills.

These rugged mountains in New York State, just 90 miles northwest of New York City, are famous for the legendary tales of Rip Van Winkle, and more recently for the summer hotels mat sprang up in the region during the 1940s, 1950s, and 1960s. Families trying to escape the heat of New York City found the Catskills to be the perfect place to stay for a month or so each summer. By the late 1950s there were over 500 resorts and hotels offering nighttime entertainment as well as all kinds of outdoor activities. Famous comedies like Jackie Gleason, Joan Rivers, and Sid Caesar all got their start touring the hotel clubs here. Since the introduction of air-conditioning and cheaper air travel, however, families have stopped coming to the Catskills in such large numbers, chasing instead more distant locations at different times of the year. Many of the Catskills hotels closed in the 1970s, but some remain and have expanded and changed their facilities to meet the needs of today’s visitors.

Currently, there are many activities available to the traveler besides witnessing the changing colors of the leaves. There is an all-organic sheep farm where visitors can see how a traditional sheep farm operates. There are also hundreds of miles of scenic drives in the area. Route 42, for instance, is an excellent site for spotting bald eagles. For more information on vacations in the Catskills, call the office of Public Information.

The word "spotting" underlined in Paragraph 3 means ().

A. photographing

B. seeing

C. painting

D. shooting
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单项选择题

气体渗碳过程中，随时观察排气管火焰的颜色和长度来判断炉内的工作状况，正常情况时火焰状态应是（）。

A.火焰长，尖端出现亮白色

B.火焰短，外缘呈浅蓝色

C.火焰稳定，长度约80mm～120mm呈浅黄色

D.火焰亮，有大量火星
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