问题 问答题 简答题

尿素成品含水量高的原因?

答案

参考答案:

⑴一、二段蒸发温度或真空度达不到设计指标;

⑵蒸发加热器列管或管板泄漏;

⑶分离器上部冲洗水管阀门内漏;

⑷熔融泵入口管上蒸汽吹除阀或造粒主线蒸汽吹除阀内漏;

⑸雨季空气湿度高,造粒塔内或运输皮带上当颗粒温度降低时,颗粒表面饱和水蒸气分压低于空气中饱和水蒸气分压时,尿素颗粒吸潮。

完形填空

阅读下面短文,完成有关任务。

Reading is a good habit, but the problem is, there's too much to read these days, and too little time to read every word of it. (83) There are hundreds of skills to help you read more in less time. Here are two skills that I think are especially good.

Preview--if it's long and hard. Previewing is especially useful for getting a general idea of heavy reading like long magazine articles and business reports.

Here's how to preview.

●Read the first two paragraphs and the last two paragraphs carefully.

●Then read only the first sentence of the other paragraphs.

Previewing doesn't give you all the details. (84) It keeps you from spending time on things you don't really want--or need--to read.

Skim--if it's short and simple. Skimming is a good way to get a general idea of light reading --like popular magazines or the sports and entertainment of your daily paper.

Here's how to skim.

●Get your eyes to move fast. Sweep them across each line.

●Pick up only a few key words in each line.

Everybody skims differently. You and I may not pick up the same words when we skim the same piece, but we'll get a similar idea of what it's all about.

A. 根据短文内容简要回答问题。

小题1:How many skills are recommended in this passage?

____________________________________________

小题2:What should we do when we read sports news in a daily paper according to the passage?

____________________________________________

B.将短文中划线的两个句子译成汉语。

小题3:_________________________________________

小题4:________________________________________

C. 请给短文拟一个适当的标题。

小题5:_________________________________________

单项选择题