【简答题】把一个长、宽、高分别为40厘米、10厘米、3.14厘米的长方体铁块熔铸成一个圆柱体,这个圆柱体的底面积是314平方厘米,高是多少厘米?
【简答题】一个圆柱体的底面积是15平方厘米,高是40厘米,那么它的体积是( )立方厘米
【判断题】根据GB/T15169—94《钢熔化焊手焊工资格考试方法》中试件代号的规定,字母“P”表示板状试件。()
【单选题】Directions: In this part there are 40 incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then mark the corresp...
【简答题】一段圆柱体铝棒,长40厘米,底面积是31.4平方厘米.如果把它熔铸成一个底面半径是10厘米的圆锥体,圆锥体的高应是______厘米.
【单选题】欲配制 1000ml 0.1mol/L HCl 溶液,应取浓盐酸( )mL。
【单选题】Directions: In this part there are 30 incomplete sentences. For each sentence there are four choices marked A, B, C, and D. Choose the ONE answer that best completes the sentence. Then mark the corres...
【单选题】Directions: In this part there are 30 incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then blacken the corr...
【简答题】一个圆锥的高是24厘米,体积是80立方厘米,比与它等底的另一个圆柱体的体积少40立方厘米,这个圆锥的底面积是______平方厘米,另一个圆柱体的高是______厘米.