早教吧作业答案频道 -->英语-->
关于allowdoing和allowtoPeoplearenotallowedfreelyatthemeetingandtheydon'talloweither.A.totalk;smokingB.totalk;tosmokeC.talking;smokingD.talking;tosmoke顺便请讲下后面一个空为什么这么选
题目详情
关于allow doing和allow to
People are not allowed _ freely at the meeting and they don't allow _ either.
A.to talk;smoking B.to talk;to smoke C.talking;smoking D.talking;to smoke 顺便请讲下后面一个空为什么这么选
People are not allowed _ freely at the meeting and they don't allow _ either.
A.to talk;smoking B.to talk;to smoke C.talking;smoking D.talking;to smoke 顺便请讲下后面一个空为什么这么选
▼优质解答
答案和解析
A
allow doing sth
be allowed to do sth
allow doing sth
be allowed to do sth
看了 关于allowdoing和a...的网友还看了以下：
A是n阶矩阵,r(A+E)+r(A-E)=n,证明A^2=E稍微具体一点行不。 2020-04-05 …
设n阶实方阵A=A^2,E为n阶单位矩阵,证明：R(A)+R(A-E)=n 2020-04-05 …
一道线性代数的题：设A为n阶方阵,A不等于E,且R(A+3E)+R(A-E)=n,则A的一个特征值 2020-05-14 …
设A是n阶矩阵A^2=E,证明r(A+E)+r(A-E)=n,的一步证明过程不懂由A^2=E,得A 2020-05-14 …
设A为n阶矩阵有A的2次方等于E.求证r（A+E)+r（A-E)=n. 2020-05-14 …
设n方阵A满足A^2=A,E为n阶单位矩阵,证明R(A)+R(A-E)=n 2020-05-15 …
设n阶矩阵A满足A*A=A,E为n阶单位阵,证明：R（A）+R(A-E)=n 2020-05-15 …
设A为n*n矩阵,证明:如果A^2=E,那么R(A+E)+R(A-E)=n 2020-05-15 …
线性代数求解有n阶矩阵A,满足（A+E）（A-E）=0,怎么得出R(A+E)+R(A-E)≤n不懂 2020-06-28 …
1、已知n阶矩阵A满足:R(A+E)+R(A-E)=n,证A(A+2E)(A+4E)-3(A+2E) 2020-11-03 …