读短文，判断对(√)错(×)。

      It was Saturday. Tom stayed at home. His parents went to visit his grandparents in another city. Tom did his

homework and read books. After lunch, he watched TV and played basketball with Jack. He felt very tired. In

the evening, his parents came back and brought him some presents. They were a schoolbag and a basketball.

Tom felt very excited!

( ) 1. Tom didn't visit his grandparents.

( ) 2. Tom read books in the afternoon.

( ) 3. Tom felt tired after reading books.

( ) 4. Tom's parents bought a new schoolbag for him.

( ) 5. Tom was happy in the evening.

列关于准确度与精密度关系的正确说法是（）。

A、准确度高精密度一定高

B、精密度高不一定准确度就高

C、准确度高精密度不一定就高

D、精密度和准确度没有任何关系