缺词填空。

    Peter is my good friend. He is very (1)g           . He is willing to (2)s            his things with us.

He is one of the (3)n            boys in my class. What's he (4)l           . He's friendly and helpful. He's

(5)r            to help us any time. He'd like to be a doctor when he (6)g           up. Lindy is (7)a          

my friend. Now she has (8)p            with her new school. She has no friends there. Sometimes, she

is very (9)n            and can't answer her classmates' questions. She is really uncomfortable at that

school. She hopes I can give her some (10)a           . 

水的CT值通常是

A．-1000HU
B．-500HU
C．0HU
D．+500HU
E．+1000HU