在图中,L1、L2两灯电阻相同,电源电压6V,S闭合后,两灯均正常发光,问此时电

题型:问答题

问题:

在图中,L1、L2两灯电阻相同,电源电压6V,S闭合后,两灯均正常发光,问此时电压表V示数为多少?如L2灯突然开路,则电压表示数为多少?

考点:欧姆定律及其应用电压的测量,电压表的使用
题型:问答题
请认真阅读下面短文,并根据所读内容在文章后图表中的空格里填入最恰当的单词。(每空一词)
Many people have trouble with reading. Reading is a process of the brain where you look at eaning in them. If you develop good reading skills, it’ll be very helpful to your future. Aren’t your school teachers always saying “Read more books!”?
Read as much as you are able. Start with titles, names, or other larger print items that you may know or ever thought about. When you start getting bored or need a break, take one. Reading should be fun and enjoyable, don’t force it. After your break, return to where you were, and continue.
Read the page carefully. Don’t rush, take your time. Most people think that skimming the pages is a way of fast reading, but this definitely not true.
Use context clues to find out a word’s meaning. Context clues are when a person figures out the meaning of a word by seeing how the word was used in a sentence. For example, you were reading the following sentence and wanted to know what “pessimist” means: My mother is always happy and optimistic, the total opposite of my brother, the pessimist. So from the sentence, you can gather that “pessimist” means the opposite of happy. If you find a really difficult word, use the dictionary!
Reread! If you don’t understand what you are reading, read over the sentence(s) again. Try reading the words out loud to yourself. If you still don’t understand something, ask a good reader nearby to explain the sentence(s) to you, or simply pick up a book that is easier to read and more proper to your reading level. Feel free to use your finger as a pointer. It will keep your eyes focused on the line you are reading, improving your understanding!
Keep reading! Try to read as much as you can in your free time. Reading will help you in lots of ways; your vocabulary will become larger and you will notice your grades change for the better in school. Have fun reading!
To get the most comprehension, avoid lying down while reading. While reading in bed can help you relax and fall asleep, you can remember more information by having a good posture(姿势)while reading.
Title:   小题1:  to Improve Reading
_ 小题2:for developing reading
Reading will be very   小题3:  to your future.
 
 小题4: 
Read as much as   小题5: .
Read the page carefully.
                    *  Figure out the meaning of a word by seeing how the word was   小题6: in a sentence.
Turn to context clues   *  Use the dictionary if necessary.
                    *  Read the sentence(s)   小题7:  when you don’t understand .
Reread               *  Turn to a good reader for help.
*  Keep your eyes  小题8:  on the line you are reading.
                     *  Read as much as you can.
Keep reading          *  Enlarge your vocabulary.
  小题9:  reading.
The posture of reading
Don’t   小题10:  down while reading.
题型:问答题

金属燃烧生成的氧化物及反应表面毗邻的部分金属被燃烧热熔化后,再被气流吹掉的切割方法是( )。

A.激光切割

B.气割

C.等离子弧切割

D.碳弧切割

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A.发射天线

B.同轴继电器

C.隔离器

D.腔体滤波器

题型:问答题

电力公司过网费收入是否征收增值税?

题型:问答题

无线电波实际上是()。

A、电磁波

B、电场

C、磁场

D、以上都不对

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