在对流换热过程中,介质有相变时传热系数一般会()。 A.增大 B.减小 C.不变 D

题型:单项选择题

问题:

在对流换热过程中,介质有相变时传热系数一般会()。

A.增大

B.减小

C.不变

D.随相变方向而变

考点:汽轮机检修汽轮机本体检修工(中级)汽轮机本体检修工(中级)题库
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学浩同学在实验室里学习制取CO2,他的具体操作步骤如下:

(1)组装仪器后进行了装置气密性的检查,见图A.请你帮他判断一下这套装置是否漏气?

(2)他从稀硫酸、稀盐酸中选取了一种酸与石灰石反应制CO2.想一想他不选另一种酸的理由是什么?

(3)学浩同学想用图B装置来制取CO2,你认为是否理想?

(4)请你告诉他集满CO2的集气瓶应该______(填“正”或“倒”)放在桌面上.

题型:单项选择题

Would you eat a ready meal from the fridge rather than cook from scratch (从头开始 )? Have you been doing internet shopping rather than going to the stores? What can't you be bothered to do?

A study into how lazy British people are has found more than half of adults are so idle they'd catch the lift rather than climb two flights of stairs.

Just over 2000 people were quizzed by independent researchers at Nuffield Health, Britain's largest health charity. The results were surprising.

About one in six people surveyed said if their remote control was broken, they would continue watching the same channel rather than get up.

More than one third of those questioned said they would not run to catch a bus. Worryingly, of the 654 respondents (回答者) with children, 64% said they were often too tired to play with them.

This led the report to conclude that it's no wonder that one in six children in the UK are classified as obese (肥胖) before they start school. 

Dr Sarah Dauncey, medical director of Nuffield Health, said: "People need to get fitter, not just for their own sake, but for the sake of their families, friends and obviously their pets too.

"If we don't start to take control of this problem, a whole generation will become too unfit to perform even the most basic of tasks."

And Scotland's largest city, Glasgow, was shamed as the laziest city in the UK, with 75% surveyed admitting they do not get enough exercise, followed closely by Birmingham and Southampton, both with 67%.

The results pose (对... 提出) serious challenges for the National Health Service, where obesity-related illnesses such as heart disease and cancer have been on a steady increase for the past 40 years and are costing billions of pounds every year.

小题1:For the interest of country people should         .    

A.continue watching the same channel rather than get up to get the remote control

B.carry out even the most basic of tasks

C.get enough exercise to get fitter

D.admit they do not get enough exercise小题2:Which of the following statements agrees with British people?  

A.They are fond of climbing the stairs.

B.They are willing to accompany their children.

C.They like sports and get enough exercise.

D.They are suffering from obesity-related illnesses.小题3:What does the word "idle" in paragraph 2 mostly probably mean?   

A.active

B.lazy

C.optimistic

D.pessimistic小题4:Which country is the writer most likely to come from?

A.America

B.China

C.U.K

D.France小题5: What's the main idea of the passage?  

A.UK is taking measures to get over laziness.

B.How lazy British people are.

C.British people are suffering from laziness.

D.Challenges for the National Health Service.

题型:单项选择题

触变泥浆注浆工艺方案应包括()。

A.泥浆配比、注浆量及压力的确定

B.制备和输送泥浆的设备及其安装

C.注浆工艺、注浆系统及注浆孔的布置

D.泥浆材料的选择、组成和技术指标要求

E.纠偏控制

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一次触感元件将采集的数据信号转换为电平信号输入计算机,然后由相应的程序完成显示,计算处理及()等各功能。

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导游人员对旅游行政部门作出的罚款、吊销导游证、责令改正、暂扣导游证等行政处罚不服,可以______。

A.向上一级旅游行政部门申请复议
B.向地方人民法院提起行政诉讼
C.向仲裁机构申请仲裁
D.向上一级旅游行政部门申请复议或向地方人民法院提起行政诉讼

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