【单选题】【消耗次数：1】
The game was fixed for today but it has been____ for a week.
①
transfered
②
delayed
③
translated
④
postponed
参考答案：
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相关题目
【单选题】
This ATM has been out of service for a few days. It should ____ last week.
①
be fixed
②
have fixed
③
fix
④
have been fixed
【单选题】
This ATM has been out of service for a few days. It should ____ last week.
①
be fixed
②
have fixed
③
fix
④
have been fixed
【单选题】
[] has been made clear to all of us, none of you are to come late to class from today on.
①
It
②
As
③
What
④
Which
【单选题】
He said that his sister ?[填空]been there one week before
①
had
②
has
③
have
④
will have
【单选题】
The disappearance of her paper has never been _____.
①
counted for
②
looked up
③
accounted for
④
checked up
【单选题】
The sandwhich course, [填空]I have been on for a week ,is really excellent.
①
which
②
that
③
whose
④
who
【单选题】
The new technology has been ( ) in the industrial production.
①
utilized
②
possessed
③
elevated
④
focused
随机题目
【单选题】
下列说法错误的是（）
①
若n阶线性方程组Ax=b的系数矩阵行列式|A|<SPANstyle="FONT-SIZE:10.5pt；FONT-FAMILY:宋体；mso-bidi-font-family:TimesNewRoman；mso-font-kerning:1.0pt；mso-ansi-language:EN-US；mso-fareast-language:ZH-CN；mso-bidi-language:AR-SA">≠0</SPAN>，则该方程组存在唯一解；
②
若n阶线性方程组Ax=0的系数矩阵行列式|A|≠0，则该方程组只有零解；
③
一个行列式交换两列，行列式值不变；
④
若一个行列式的一列全为零，则该行列式的值为零
【单选题】
设A和B皆为n阶方阵，则下面论断错误的是()。
①
A与B等价的充要条件是rank(A)=rank(B)
②
若A与B等价，则|A|=|B|
③
A与B等价的充要条件是存在可逆阵P、Q，使A=PBQ
④
A可逆的充要条件是A等价于E<SUB>n</SUB>
【单选题】
对n阶实矩阵A和非零常数k，下列等式中正确的是（ ）
①
|kA|=k<SUP>n</SUP>A
②
|kA|=k<SUP>n</SUP>|A|
③
|kA|=k|A|
④
|kA|=kA
【单选题】
集合A={a,b,c}，A上的二元关系R={<a,a><A,A>,<B,B>,<A,C><b,b><a,c>}，则R具有以下性质（）。</a,c></b,b></a,a>
①
自反性、反对称性、传递性
②
反自反性、反对称性、传递性
③
对称性、传递性
④
反对称性、传递性