【简答题】布尔类型的值包括True和False,我们用( )表示 True 。
【单选题】She is so careless with her spelling that she often ______ letters.
【简答题】A.She agrees with the man. B.She gives up to the husband. C.She doesn't say. D.She still prefers to go by sea.
【简答题】This singer is always very ____ to the reaction of the audience when she gives a performance. A) sentimental B) sensible C) positive D) sensitive
【简答题】若 ,函数 的最大值是0, 则此函数的最小值是___________.