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【单选题】
听力原文： Anne Bancroft won an Oscar in 1963 for her powerfully moving portrayal of Annie Sullivan, the inspiring teacher of the young Helen Keller in the film The Miracle Worker. It was one of her proudest moments. But it was her role as the seductive, bored middle-class housewife, in The Graduate, that worked miracles for her career. More than fifty years ago, this New York-born daughter of Italian immigrants was persuaded by Hollywood studio bosses to change her name to help her career. It was one of the few compromises made by one of America's finest and most artistically uncompromising actresses. In the film The Miracle Worker, Anne BancroftA.
took the role of Helen Keller.
B.
was very proud of her performance.
C.
worked miracles for her career.
D.
played the role of a middle-class housewife.
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举一反三
【单选题】醇类化合物中由于分子间氢键增强, O—H 伸缩振动频率随溶液浓度的增大而( )。
A.
可能向高波数移动、也可能向向低波数移动。
B.
向高波数移动
C.
向低波数移动
D.
不变化
【单选题】醇类化合物中由于分子间氢键增强，O—H伸缩振动频率随溶液浓度的增大而
A.
向高波数移动
B.
向低波数移动
C.
无变化
D.
可能向高波数移动、也可能向 向低波数移动。
【简答题】供给是供给意愿和 的统一。
【简答题】(逆矩阵01)
【简答题】若矩阵A有特征向量i=（ 10 ）和j=（ 01 ），且它们所对应的特征值分别为λ 1 =2，λ 2 =-1． （1）求矩阵A及其逆矩阵A -1 ； （2）求逆矩阵A -1 的特征值及特征向量； （3）对任意向量α=（ xy ），求（（A -1 ） 20 α．