煤粉粉炉二次风一般都是(),是配合一次风()满足煤粉燃烧所需要的空气量。

题型:填空题

问题:

煤粉粉炉二次风一般都是(),是配合一次风()满足煤粉燃烧所需要的空气量。

考点:锅炉检修工考试锅炉管阀检修中级工锅炉管阀检修中级工题库
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用直探头以水为透声楔块使钢板对接焊缝中得到横波检测,此时探头声束轴线相对于探测面的倾角范围为:()

A、14.7°~27.7°

B、62.3°~75.3°

C、27.2°~56.7°

D、不受限制

题型:填空题

用混凝沉淀法处理废水时,应考虑混凝剂的选择和最佳投药量。

题型:填空题

各种疾病所对应的B超声像特点是

玻璃体腔硅油残留( )

A.久玻璃体暗区内与弧形视盘相连的弧形光带,后运动阳性
B.玻璃体腔内散在分布的强回声光点,并有明显的启发运动
C.玻璃体内弥漫的回声光点或弱光团,无肿瘤回声及钙斑反射
D.凸向玻璃体腔的圆顶形肿瘤,前部内回声强,后部回声明显减弱,并见脉络膜凹陷
E.玻璃体强回声光斑,其后可见尾随回声

题型:填空题

阅读理解。

     The practice of students endlessly copying letters and sentences from a blackboard is a thing of the

past. With the coming of new technologies like computers and smartphone, writing by hand has become

something of nostalgic (怀旧的)skill. However, while today's educators are using more and more

technology in their teaching, many believe basic handwriting skills are still necessary for students to be

successful-both in school and in life.

     Virginia Berninger, professor of educational psychology at the University of Washington, says it's

important to continue teaching handwriting and help children acquire the skill of writing by hand.

Berninger and her colleagues conducted a study that looked at the ability of students to complete various

writing tasks-both on a computer and by hand. The study, published in 2009, found that when writing

with a pen and paper, participants wrote longer essays and more complete sentences and had a faster

word production rate.

     In a more recent study, Berninger looked at what role spelling plays in a student's writing skills and

found that how well children spell is tied to know well they can write. "Spelling makes some of the

thinking parts of the brain active which helps us access our vocabulary, word meaning and concepts. It is

allowing our written language to connect with ideas." Berninger said.

     Spelling helps students translate ideas into words in their mind first and then to transcribe(转换) "those words in the mind written symbols on paper or keyboard and screen," the study said. Seeing the words

in the "mind's eye" helps children not only to turn their ideas into words, says Berninger, but also to

spot(发现) spelling mistakes when they write the words down and to correct then over time.

"In our computer age, some people believe that we don't have to teach spelling because we have spell

checks," she said. "But until a child has a functional spelling ability of about a fifth grade level, they won't

have the knowledge to choose the correct spelling among the options given by the computer."

1. What makes writing by hand a thing of the past?

A. The absence of blackboard in classroom.

B. The use of new technologies in teaching.

C. The lack of practice in handwriting.

D. The popular use of smartphones.

2. Berninger's study published in 2009 ___________.

A. focused on the difference between writing by hand and on a computer.

B. indicated that students prefer to write with a pen and paper.

C. found that good essays are made up of long sentences.

D. discussed the importance of writing speed.

3. Which of the following best shows the role of spelling?

A. Spelling improves one's memory of words.

B. Spelling ability is closely related to writing ability.

C. Spelling benefits the translation from words into ideas.

D. Spelling slows down finding exact words to express ideas.

4. What does "mind's eye" in paragraph 5 mean?

A. Window.

B. Soul

C. Picture.

D. Imagination.

5. What conclusion could be drawn from the passage?

A. Computers can help people with their choice of words.

B. Spell checks can take the place of spelling teaching.

C. Handwriting still has a place in today's classrooms.

D. Functional spelling ability develops fast in the fifth grade.

题型:填空题

何谓现金流量?现金流量一般用什么来表示?

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