没有明显流幅的钢筋具有的特点是（）。A．含碳量多 B．塑性差 C．延伸率小 D．强度

阅读短文，判断正(T)误(F)。

      Hello, I am Amy. I am a girl. I am ten. I have a new classroom There is (有) a teacher's desk. The wall is

white. The fan is yellow. I like the classroom very much.

( ) 1. Amy is a boy.

( ) 2. Amy has a new classroom.

( ) 3. Amy is nine.

( ) 4. The wall is blue.

( ) 5. Amy likes the new classroom.

— I’m sorry to have broken your cup.

— __________, Kate.

A．You’re welcome.

B．Go ahead.

C．Don’t mention it.

D．No problem.

以下不是Java中正确的整数表示的是 ( )

A．22

B．ox22

C．o22

D．22H

如何理解铁磁性材料的磁滞回线？