The alarm clock rang and a new day began.
My alarm clock is ringing, it's time to get up.
Alarm clock is the best way to wake me up in the morning.
I was awakened by the alarm clock this morning.
My day starts with the sound of an alarm clock.
The alarm clock is the sound that wakes me up every working day.
I was woken up by the alarm clock to start a new day.
The alarm clock is my good friend. It wakes me up on time every morning.
My alarm clock is ringing, and it's time to start a new day.
When I heard the alarm clock, I knew that a new day had begun.
What is an alarm clock?
An alarm clock is a kind of clock with an alarm device. It can not only indicate the time, but also send out sound signals or other signals according to people's predetermined time. The movement structure of alarm clock mainly includes mechanical and timely electronic.
Other types, such as transistor hairspring and tuning fork, are rarely used. They are called desktop alarm clocks that are usually placed on the table and travel alarm clocks that are mainly used for travel. The time error of daily mechanical alarm clock is generally within 120 seconds/day, while the time error of timely electronic alarm clock is generally within 0.2 seconds/day.
system of selection
(1) Check the appearance first: the bell shell is bright and uniform in color, without paint peeling, discoloration and scratches. The clock face should be clean, with even scale and clear handwriting.
(2) Check the sensitivity: slightly start the clockwork, and the second hand will start to move, which proves that the sensitivity is high. A clock with high sensitivity takes a long time.
(3) Check out of tune: place the clock from left to right, face up and down. If the sound of walking in all directions is consistent, even without noise, it means that walking is normal.
(4) Check whether the needles are in contact: when the hour hand and minute hand move, the hour hand, minute hand and second hand overlap (three needles overlap), and a certain gap should be kept between the three needles, and no friction is allowed. At the same time, there should be a proper gap between the pointer and the clock face and glass.