使用电容式闪光继电器开右转向灯时,闪光频率较快,可能是因为()。
A.右侧灯泡功率大
B.左侧有断路
C.右侧个别灯泡断路
D.左侧灯泡功率小
参考答案:C
阅读短文,判断正(√)误(×)。
Hi, I'm Li Ming. I am going to have a busy weekend! On Saturday, my father is going to buy some
newspapers. My mother is going to go shopping. I'm going to visit my friend, Mike. On Sunday, my father
is going to read a magazine. My mother is going to watch TV. I'm going to the bookstore. I'm going to buy
some comic books. After that we are going to the cinema.
( ) 1. Li Ming's father is going to buy a dictionary on Saturday.
( ) 2. His mother is going to go shopping on Saturday.
( ) 3. Li Ming is going to visit his friend on Sunday.
( ) 4. His mother is going to watch TV on Sunday.
( ) 5. Li Ming is going to buy some comic books on Sunday.
按国家颁布的《电、热价格》规定,应执行照明电价的有()用电。
A.铁道修理工厂
B.基建工地施工
C.电扇、电冰箱
D.烹调、烘焙、取暖
E.铁道信号灯