问题 问答题 简答题

为什么催化剂烧焦时控制空气加入量可控制再生的床层温度?(KHD:事故判断处理及应变能力)

答案

参考答案:

再生时床层温升主要与含氧量有关,而与烟气及床层温度无关。空气与蒸汽量比例合适可避免过热,并使烧焦均匀彻底。

判断题
阅读理解

I do a lot of hiking.And I can step out of my house and within minutes reach a beautiful forest where I walk for exercise every day.I see many photography subjects such as parrots,snakes,hares,big trees and flowers.There are so many different flowers around my place that once I decided to see how many types I could count in a one­hour­long walk,and I counted over 100.

Needless to say,as a keen amateur photographer,I always take a camera with me.I have three favorites: a Pentax Optio RZ10,a Sony Alpha 390 and a Panasonic Lumix FZ100.I mostly take the Pentax pocket camera with me.This Pentax pocket camera takes images as good as those from much more expensive Single Lens(镜头)Reflex cameras.It allows you to get to just 1 cm from the subject,and these images are of astonishing clarity(清楚).I can stick the camera right into a flower.And the photo shows fantastic details.

The Pentax is also good at taking landscapes.The color is natural and price again the details even of distant objects are great.Sometimes,even when I have one of my other cameras with me,I still just use the Pentax pocket camera.About half of all the images on my website were taken with the Pentax.

The Pentax takes quality images in poor light and the zoom works well.You have to work hard to get a blurry(模糊的)shot.This is an especially good feature at parties and gatherings.You get fantastic photos of people.You don't have to wait for them to keep still.

Keep this camera in your pocket or in the car.It takes up little room;it's light and you'll never regret it!

小题1:Why does the author walk through the beautiful forest every day?

A.He takes exercise to keep fit.

B.He goes there to count flowers.

C.He takes photos in the forest.

D.He goes to see photography subjects.小题2:Which of the following cameras did the author use most?

A.The Sony Alpha 390.

B.The Pentax Optio RZ10.

C.The Panasonic Lumix FZ100.

D.The Single Lens Reflex camera.小题3:We can infer from the passage that________.

A.the author is a professional photographer

B.the author took blurry photos at gatherings

C.the author has put half of his photos on his website

D.it is good to take a quick photo with the Pentax小题4:In the last paragraph the author advised us to________.

A.buy a very small camera

B.take photos of our friends

C.keep a Pentax at hand

D.take photos wherever we are