count down fromdown 和from 分别是什么词性

count down fromdown 和from 分别是什么词性 count down three English Oral Count down:8 more days Down for the count翻译下 count count COUNT count count count count You Can____me,I'll help youA:countB:count onC:count inD:count down选哪个?为什么?（我现在正在初学英语, 求：用词组count down造个句子比如：到暑假还有30天。 count down 97.Today is begin the third day这个短语是什么意思 ( ).Can you count from zero _____ ten?A.up B.to C.down how to answer don't let me downcount on me可以吗 count+=count++是什么意思? down[i][k]=0;case8:sum=212;break;printf(对方拒绝接受! );inti,m,j,k,count;