皮皮学，免费搜题
登录
搜题
【单选题】
现场安装高频 X 线机电源线时,以下说法正确的是( )A.
三相四线供电的 X 线机电源线是三根相线、一根零线；
B.
三相四线供电的 X 线机电源线是三根相线、一根接地线；
C.
相对于工频机来讲，由于管电压、的控制精度高，所以高频 X 线机对电源电压的稳定性要求更高;
D.
X 线机的电源线的长度不同，对线径的要求也不同，要求电源连线越长时，线经要越细。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】试比较茯苓、猪苓的来源及性状特征。
【简答题】Accompanied by cheerful music,we began to dance.
【单选题】The speaker believes that .
A.
music is a spoken language
B.
music develops as we grow up
C.
music is above the other arts
D.
music plays an important part in our life
【简答题】What can we do if we want to look for some information about baroque music in the future?A. We can read the information on the music. B. We can get a set of records of the music. C. We can hear an exa...
【单选题】What do we learn from the passage?
A.
The music is played in concerts．
B.
The music is played only in restaurants and stores．
C.
The music is comparable with modern pop music．
D.
The music put you in a right mood．
【简答题】完形填空Music is part of every culture on Earth. Many people feel that music makes life worth___1___. We can make music ourselves if we play an instrument or sing. We can hear music on CDs and on radio or...
【单选题】When we listen to music, we are easily ______ of events in the past.
A.
remembered
B.
reflected
C.
memorized
D.
reminded
【单选题】From the passage, we know that ______.
A.
music can be divided into slow music and fast music
B.
whether slow music and fast music is effective or not depends on the background
C.
music are always helpful to the overall sales
D.
without music people have difficulty in shopping and having dinners
相关题目：