()是指由于经济发展或科技进步的原因，使设备原有的价值贬值而造成的磨损。
A.有形磨损
B.无形磨损
C.使用磨损
D.自然磨损
参考答案：B
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.
鉴定结论属于证据之一。
