IP addresses are the unique sequence of numbers ______ to each computer, websites or other Internet-connected devices.
A．to assign B．a(chǎn)ssigning
C．a(chǎn)ssigned D．being assigned
C

試題分析：考查非謂語動詞。numbers和assign是動賓關(guān)系，用過去分詞表示被動、完成；相當(dāng)于定語從句which are assigned to...。句意：IP地址是分配給每臺電腦、網(wǎng)站或其它互聯(lián)網(wǎng)裝置的一串特殊的數(shù)字。故選C。
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