一个旁承盒焊装（）个挡销，单侧焊装。
A.1
B.2
C.3
参考答案：B
---- Is this the recorder you wish to _______ ? ----- Yes, it is .
A．repair it
B．have repaired
C．have it repaired
D．be repaired
Internet的雏形是( )。
A．Netware
B．Ethernet
C．Local Network
D．ARPANet
