Don'tdisturbme．Ilettersallmorningandtensofar．[]A．write;wroteB．amwriting;havewrittenC．waswriting;wroteD．havebeenwriting;havewritten
Don't disturb me．I ________ letters all morning and ________ ten so far．
A． write; wrote
B． am writing; have written
C． was writing; wrote
D． have been writing; have written
设A为n阶矩阵,证明：R(A+I)+R(A-I)>=n已知R(A)＝R(kA),k≠0；R(A+B 2020-05-14 …
已知字母组合成英语单词1、e e t t i n h r 2、e e r a t w h 3、o 2020-05-14 …
a a c i n o r t组成什么单词 2020-05-16 …
"a,a,c,i,n,o,r,t"能组成什么单词 2020-05-16 …
（b o r i r h e l）把括号里的字母组成一个单词, 2020-05-16 …
纵横字谜之英语暑假作业题（s)(o)(r)(r)(n)(g)(r)(e))(a)(k)(k)(e) 2020-06-06 …
r是共用体,定义*s=&r；依次定义s->i[0]=ox39;s->i[1]=ox38;为什么输出 2020-06-14 …
英语单词填空1.时间状语：d-r-n-2.场所：b-s-s-o-f-r--e-a-t-e-t3.教 2020-07-14 …
(e)(a)(r)thush(e)(r)sh(i)(r)tl(e)(a)(r)ncol(o)(u)( 2020-11-27 …
英文单词分类填空动物类1.O()t()p()s2.k()t()e()3.l()b()t()r4.a( 2021-02-05 …