同一材料中，两种不同长度试件测定伸长率的δ5和δ10值相比（）。A.δ5值小，δ10

执行以下程序后输出的是( )
Private Sub Command1_Click()
Ch$="AABCDEFGH"
Print Mid(Right(ch$,6),Len(left(ch$,4)),2)
End Sub

A．CDEFGH
B．ABCD
C．FG
D．AB

引起颞颌关节弹响的原因是（）。

A.骨质增生

B.关节炎

C.翼外肌功能亢进

D.关节囊粘连

E.关节脱臼

He often practice _____ the piano in his room.[ ]

A. play  

B. playing  

C. to play  

D. played

Packet-switching wireless networks are preferable (1) when transmissions are (2) because of the way charges are (3) per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are (4) for the (5) of time they use the network.

4（）

A．charged

B．fined

C．free

D．controlled

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