第二代移动通信系统主要采用数字式时分多址和()技术。
A、空分多址C
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Pleasewriteareport_______theabovesubjectsaretobecovered.
Lexicalmanipulationisoneaspectoftherhetoricalfeaturesofidioms.ThefollowingEXCEPT______belongtolexicalmanipulation.
Generally,adictionarycoversthefollowingcontentsEXCEPT______.
Wordsthatareidenticalonlyinspellingbutdifferentinsoundandmeaningarecalled______.
Amongthefollowingwords,“______”doesNOThaveinflectionalaffixes.
