【单选题】"...lofty ceilings are all made of gorgeous, dark wood that is so impeccably polished that it shines.” The underlined word means________.
A.
improve in behavior, intellectual interests, etc
B.
make or become smooth and shiny
C.
a smooth shiny surface produced by rubbing
D.
the quality of being graceful
【判断题】用观察的方法判断下列数列极限是否存在(或数列是否收敛) (1)10,10,10,10,...; (2) , , , ,...; (3)0.9,0.99,0.999,0.9999,...; (4)1, , , , , ,....
【判断题】客户需求分析常用的理论,是基于以客户为中心的顾问式销售法的销售冰山理论。
【多选题】旅游者要求单独外出购物时,导游人员应当()
【判断题】数列 3,5,10,5,5,5 , ... , 5 , ... 的极限是 5
【简答题】观察下列数列的极限是否存在,如果存在,求出极限 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
【简答题】丝锥按使用方法分类,可分为 和 两大类。