【单选题】听力原文:The engine of Margaret's car was not running smoothly. The spark plugs needed cleaning. Margaret could have done the job herself, but garages have special equipment that does such things very tho...
A.
Do extra work if necessary.
B.
Clean the spark plugs only.
C.
Change the spark plugs only.
D.
Charge her more than ~ 10 if necessary.
【判断题】以计数的方式获得的数据,其观测值用整数表示,这类数据称为连续性变数。()
【简答题】()模式能够提供一种方法按照顺序访问一个聚合对象中的所有元素,而又不需要暴露该对象的内部表示。
【简答题】1 ) In decades, most women, like men, work from economic ________ and gain respect. A. necessity B. essence C. background D. requirement 2 ) At the piano concert, he gave a great performance, but he w...
【简答题】连续性变数资料制作次数分布表在确定组数和组距时应考虑: