题目内容
感性负载适当并联电容器可以提高功率因数，它是在负载的有功功率不变的情况下，使线路的（）增大，总电流减小。
查看答案
搜索结果不匹配？点我反馈
更多问题
在提高日光灯功率因数的实验中，并联电容后，总电流减小，有功功率（ ）。
若线圈电阻为60Ω，当线圈外加200V正弦电压时，线圈中通过的电流为2A，则线圈的感抗为（）Ω。
能量转换过程不可逆的电路功率常称为有功功率功率；能量转换过程可逆的电路功率叫做无功功率功率；这两部分功率的总和称为视在功率。能量转换过程不可逆的电路功率常称为有功功率功率；能量转换过程可逆的电路功率叫做无功功率功率；这两部分功率的总和称为视在功率。（）
Directions:In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.A few months ago, I was down with a terrible cold which ended in a persistent bad cough. No matter how many different __1__ I tried, I still couldn’t get rid of the cough. Not only did it __2__ my teaching but also my life as a whole. Then one day after class, a student came up to me and __3__ traditional Chinese medicine. From her description, Chinese medicine sounded as if it had magic power that worked wonders. I was __4__ because I knew so little about it and have never tried it before. Eventually, my cough got so much __5__. that I couldn’t sleep at night, so I decided to give it a try. The Chinese doctor took my pulse and asked to see my tongue, both of which were new __6__ to me because they are both non-existent in Western medicine. Then the doctor gave me a scraping（刮）treatment known as ‘Gua Sha’. I was a little __7__ at first because he used a smooth edged tool to scrape the skin on my neck and shoulders. A few minutes later, the __8__ strokes started to produce a relieving effect and my body and mind began to __9__ deeper into relaxation. I didn’t feel any improvement in my condition in the first couple of days, but after a few more regular visits to the doctor, my cough started to __10__. Then, within a matter of weeks, it was completely gone!A) deepen E) lessen I)remedies M)temporaryB) experiences F) licenses J)scared N)trembleC) hesitant G) pressured K)sensitive O)worseD) inconvenience H) recommended L)sink
微信支付 
支付宝支付