根据短文判断正 （T）误 （F）。

    This is my family. My grandfather is Peter Smith.My grandmother's first name is Linda.  My father is

Frank. And my mother is Lucy. My uncle and aunt are nice people. Their son is Sam.  My name is Jim.     

( )1. My grandfather's last name is Peter.

( )2. Lucy is Frank's mother.

( )3. Lucy is Sam's aunt.

( )4. Sam is Jim's cousin.

硬度试验中，布氏硬度测量压痕的深度。