问题
单项选择题
具有结构简单、严密性较高，但阻力比较大等特点，主要用于热水供应及高压蒸汽管路上的阀门为（）。
A．截止阀
B．闸阀
C．蝶阀
D．旋塞阀
答案
参考答案：A
解析：
截止阀主要用于热水供应及高压蒸汽管路中，它结构简单，严密性较高，制造与维修方便，阻力比较大。
搜题请搜索小程序“爱下问搜题”
具有结构简单、严密性较高，但阻力比较大等特点，主要用于热水供应及高压蒸汽管路上的阀门为（）。
A．截止阀
B．闸阀
C．蝶阀
D．旋塞阀
参考答案：A
解析：
截止阀主要用于热水供应及高压蒸汽管路中，它结构简单，严密性较高，制造与维修方便，阻力比较大。
How can you make a million dollars in one month? I’m sure I am going to get the ____41____ of many readers with the question. The ____42____ news is that you are not going to make a million dollars in one month ____43____ you win the lottery ( * * ) or some other prize. We all want to be millionaires. However, if you try to ____44____ how they became that rich, you will learn that they worked very ____45____ for the money. That is what most ____46____ have had to do, including Bill Gates and Andrew Carnegie, and they often went ____47____ hardships before they succeeded ____48____. There are many reasons why the millionaires have made it ____49____ for themselves. In this article, I am going to ____50____ passion (热情) which I think is the most ____51____ quality to have in order to succeed. I am sure that if one were to ____52____ the people who made millions in their lifetime, this would be found in all of them. Take J.K. Rowling for ____53____. Her first Harry Potter book was sent to twelve publishing houses, all of which ____54____ to publish it. A year later, she was finally given the chance by a small ____55____, which paid ￡1,500. And the ____56____ from that company was that she should get herself a job since she had little ____57____ of making a living by writing children’s books. If you want to make a million dollars, find something that ____58____ you really passionate and work hard at it. It doesn’t ____59____ what it is. Let me know how you ____60____.
|