【判断题】
<img class=jc-formula data-tex={ \begin{ pmatrix } 1 1 \\ 1 2 \end{ pmatrix } }^{ -1 }=\begin{ pmatrix } 2 -1 \\ -1 \quad 1 \end{ pmatrix } src=https://huaweicloudobs.ahjxjy.cn/EEEF78D8A9C6A3D538987CB168D2622E.png style=vertical-align: middle;/>
①
正确
②
错误
【简答题】
Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[ought to; look forward to; in wonder; give way to; look down; on the way to; reach out; put one’s arm around; trip over; cut into]10. The boards were[填空1]shape for further processing.
【单选题】
Children learn best by studying at their own __________ .
①
rate
②
speed
③
pace
④
growth
【单选题】
<img class=jc-formula data-tex=矩阵A经过初等行变换化为B=\left( \begin{ matrix } 2 3 \begin{ matrix } 4 1 \end{ matrix } \\ 0 3 \begin{ matrix } 1 2 \end{ matrix } \\ 0 0 \begin{ matrix } 0 4 \end{ matrix } \\ 0 0 \begin{ matrix } 0 0 \end{ matrix } \end{ matrix } \right) ，则B称为 src=https://huaweicloudobs.ahjxjy.cn/D200394455397DA3DC938E04B9CA22D6.png style=vertical-align: middle;/>
①
行阶梯形矩阵
②
行最简形矩阵
③
标准型矩阵
④
以上三种都不是
【单选题】
下列程序执行后的输出结果是（） void func1(a) { switch(a) { case 1:printf(good); case 2:printf(nice); default:printf(end); } } main（ ） { int i=2; func1(i); printf(\n); }
①
nice
②
end
③
good
④
niceend
【单选题】
We agreed to accept ____ they thought was the best guide.
①
whatever
②
whomever
③
whichever
④
whoever
【单选题】
A group of American soldiers were walking along the road in Irap when a bomb was _____, three of whom were killed.
①
set about
②
set out
③
set up
④
set off
【单选题】
Those gifts o rare books that were given t us were deeply _____.
①
appreciated
②
approved
③
appealed
④
applied