permutation and combination multiplication rule是什么意思

permutation and combination multiplication rule是什么意思 combination 和permutation的区别? comb是什么意思 COMB是什么? comb过去式 comb our we need a ()and a () to nake us more beautiful A.a mirror,a comb B.a comb,a hair dryer c.a wallet可多选 l brush my teeth,wash my face and comb my hair的中文 I brush my teeth and comb my hair.这句话有误吗? First,I get up early.Next,I brush my teeth and comb my hair.After thet,I eat breakfast. he brushed his hair with a comb,and remade it go straight backgo straight back是什么句子成分?怎么理解 英语翻译句子是这样的：if you like a gril .comb your hair and don not wear swear COMB COTTON YARN是什么意思? comb英语怎么读 comb怎么读 comb hair怎么读 comb什么意思 炫舞comb什么意思