Dust collection systems are most widely used engineering control technique.

提问人：网友minminmin100 发布时间：2022-01-07

参考答案

抱歉！暂无答案，正在努力更新中……

如搜索结果不匹配，请联系老师获取答案

您可能会需要：

重置密码查看订单联系客服

安装简答题APP，拍照搜题省时又省心！

更多“Dust collection systems are mo…”相关的问题

第1题

is another drill dust collection method and involves injecting water into the bailing airflow traveling down the drill stem.

A、Wet suppression

B、Dry drill dust collection

C、Dry suppression

D、Wet drill dust collection

点击查看答案

第2题

To address the above dust emissions during bulk loading, a common control measure is to equip the loading spout with a dry dust collection system.

点击查看答案

第3题

Many practical areas of engineering controls designed to mitigate exposure of surface mine workers to all airborne dusts, including silica, are：

A、drill dust collection systems

B、enclosed cab filtration systems

C、controlling dust on unpaved haulage roads

D、controlling dust at the primary hopper dump

点击查看答案

第4题

听力原文：A U.S. spacecraft is completing a five-and-a-half-month voyage to a distant comet

听力原文： A U.S. spacecraft is completing a five-and-a-half-month voyage to a distant comet and could create celestial fireworks when it crashes into it Monday, America's Independence Day. Scientists want to know what a comet's nucleus is made of and believe the best way to find out is to blast a hole in one.

The target is the comet Tempel—1,431 million kilometers away. (7) As NASA puts it, meeting its head on at such a gTeat distance is like threading a needle.

(8) NASA scientist Tom Morgan describes a comet as a big dirty snowball in space, a glowing collection of ice, rocks, dust, and gases whose interior composition is intriguing.

Knowing the makeup of a comet would provide information about the chemistry and physics of the solar system as it formed 4.5 billion years ago.

According to NASA, meeting the cosmic's head on from such a great distance is

A．very easy.

B．impossible.

C．possible.

D．very difficult.

点击查看答案

第5题

Today is the anniversary of that afternoon in April a year ago that I first saw the strang

e and appealing doll(玩具娃娃)in the window of Abe Sheftel's toy shop on Third Avenue near Fifteenth Street, just around the corner from my office, where the plate on the door reads: Dr. Samuel Amory. I remember just how it was that day: the first hint of spring floated across the East River, mixing with the soft-coal smoke from the factories and the street smells of the poor neighborhood. As I turned the comer on my way to work and came to Sheftel's, I was made once more aware of the poor collection of toys in the dusty window, and I remembered the approaching birthday of a small niece of mine in Cleveland, to whom I was in the habit of sending modest gifts. Therefore, I stopped and examined the window to see if there might be anything suitable, and looked at the confusing collection of unappealing objects—a red toy fire engine, some lead soldiers, cheap baseballs, bottles of ink, pens, yellowed envelopes, and advertisements for soft-drinks. And thus it was that my eyes eventually came to rest upon the doll stored away in one corner, a doll with the strangest, most charming expression on her face. I could not wholly make her out, due to the shadows and the film of dust through which I was looking, but I was aware that a tremendous impression had been made upon me as though I had run into a person, as one does sometimes with a stranger, with whose personality one is deeply impressed.

What made an impression on the author？

A．The doll's unusual face.

B．The collection of toys.

C．A stranger he met at the store.

D．The resemblance of the doll to his niece.

点击查看答案

第6题

La langue chinoise est un système ______.

A.pictographique

B.idéographique

C.idéophonographique

D.logographique