【判断题】
阅读课文II.Which Is Stronger? 判断下列句子表述内容的正误:At the beginning, the Wind thought himself very important and looked down on the Sun.
【多选题】
This is the_________ motivating force behind the development of adult education.
【单选题】
_________ do you want to learn French? What is the reason?
【单选题】
Many joggers feel that if they can succeed in jogging, they can succeed in_________ things as well.
【单选题】
We passed a pool in which ducks were_________.
【判断题】
若高维向量组线性无关,则减维后得到的低维向量组也线性无关。
【判断题】
若线性方程组AX=B的导出组AX=0只有零解,则AX=B有唯一解。
【判断题】
<img class=jc-formula data-tex=行列式\quad \begin{ vmatrix } a \begin{ matrix } b c \end{ matrix } \\ d \begin{ matrix } e f \end{ matrix } \\ a \begin{ matrix } b c \end{ matrix } \end{ vmatrix }=0 src=https://huaweicloudobs.ahjxjy.cn/C87E34DE6102091E6EA6E6BA2DE1A9FA.png style=vertical-align: middle;/>
【判断题】
若X~B(n,p)(二项分布),则数学期望EX=np.
【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;/>