搜题请搜索小程序“爱下问搜题”
问题 解答题

已知圆柱的体积公式V=S?h.

（1）若圆柱体积V一定，则圆柱的高h（cm）与底面积S（cm2）之间是______函数关系；（2）如果S=3cm2时，h=16cm，求：

①h（cm）与S（cm2）之间的函数关系式；

②S=4cm2时h的值以及h=4cm时S的值。

答案

解：（1）反比例；  

（2）①；  

②h=12（cm），S=12（cm2）。

单项选择题

Which of the following statements is NOT true regarding arrow digramming method ？（）

A．Schedule activities are represented by arrow

B．The length of the arrow represents the expected duration of the activit

C．The tail of the arrow represents the start of the activit

D．The head of the arrow represents the finish of the activit
查看答案
单项选择题

Across a wide variety of fields, data are being collected and accumulated at a dramatic pace. There is an urgent need for a new generation of computational theories and tools to assist humans in (96) useful information (knowledge) from the rapidly growing (97) of digital data. These theories and tools are the subject of the emerging field of knowledge discovery in database (KDD). At an abstract level, the KDD field is concerned with the development of methods and techniques for making (98) of data. The basic problem addressed by the KDD process is one of mapping low-level data(which are typically too voluminous to understand and digest easily) into other forms that might be more (99) (for example, a short report), more (100) (for example, a descriptive approximation or model of the process that generated the data), or more useful (for example, a predictive model for estimating the value of future cases). At the core of the process is the application of specific data-mining methods for pattern discovery and extraction.

（98）是（）

A.reason

B.sense

C.specification

D.summary
查看答案