【单选题】What can we learn from this book?
B.
The ideas how she ran the company.
【简答题】设矩阵 (其中a>0,b>0), (Ⅰ)若a=2,b=3,求矩阵M的逆矩阵M -1 ; (Ⅱ)若曲线C:x 2 +y 2 =1在矩阵M所对应的线性变换作用下得到曲线C′: ,求a,b的值.
【单选题】________ she ran to the classroom, the teacher had begun the class.
【单选题】发动机的活塞在上止点时,活塞顶上面整个空间的容积称( )。
【单选题】She ran to the hospital________ she heard the bad now.
【单选题】She ran across the street because she ______ her brother on the other side.
【简答题】选修4-2:矩阵与变换 设矩阵 M= 1 a b 1 . (I)若a=2,b=3,求矩阵M的逆矩阵M -1 ; (Ⅱ)若曲线C:x 2 +4xy+2y 2 =1在矩阵M的作用下变换成曲线C':x 2 -2y 2 =1,求a+b的值.
【简答题】SWOT是一个通用分析工具,可以用来评价商业项目,也可以用于人生、事业、就业等方面的分析,其中S指( ),W指( ),O指( ),T指( )。