已知有理数a满足（a-2012）2012=1，则a=______．

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问题填空题

已知有理数a满足（a-2012）²⁰¹²=1，则a=______．

答案

∵（a-2012）²⁰¹²=1，

∴a-2012=-1或a-2012=1，

解得a=2011或2013．

故答案为：2011或2013．

单项选择题

在微机系统中，麦克风属于( )。

A．输入设备

B．输出设备

C．放大设备

D．播放设备

单项选择题

How are riveted lap joints made watertight?（）

A.The faying surfaces are coated with white lead (or similar product) before the rivets are set

B.A sealing weld bead of 1/8" or less pitch is run along the plate edge

C.The plate edge is split close to an adjacent plate and mechanically forced into contact with the adjacent plate

D.A properly riveted joint will be watertight; any leakage is stopped by setting up on the rivets