以下关于病毒的传播途径的说法中,正确的是:
D
暂无解析
_______foralongtime,mostofthecropsinthisareadiedfromlackingwater.
By"languageacquisitionisprimarilytheacquistionofthegrammaticalsystemoflanguage",linguistsmeanthat______.
Somelinguiststhoughtthatalllanguages______andwereruledbyacommongrammar.