Read the passage and tell true (T) or false (F). 阅读短文，判断正误。
My name is Bob and I live with my parents in Shanghai, China now. I study in a primary school with
foreign children. My parents teach English in a middle school. We are very busy from Mondays to Fridays.
We live in a new house with three rooms. It is beside my parents'school, but it is far from my school. I
usually go to school by school bus.
Today is Sunday. We are all at home today. My father is sitting on a chair near the window. He is reading
a book. My mother is in the kitchen. She is cooking for us. I am in my room. I am at the table. I am doing my
homework.
( ) 1. There are five people in Bob's family.
( ) 2. His parents teach English in a middle school.
( ) 3. Their house is near Bob's school.
( ) 4. His mother is in the kitchen.
( ) 5. Bob usually goes to school by car.
时（T为交流的周期），原线圈中的电流瞬时值为0.03A．变压器的原、副线圈的匝数比为（ ）
：3