气温在10度以上时,空车运转3次,斗轮机方可进行堆取料作业。
参考答案:对
下列程序的功能是统计字符串中“array”的个数,在程序的空白处应填入的正确选项是 public class FindKeyWords{ public static void main(sring[] args){ sting text= “ An array is a data structur that stores a collection of” + “values of the same type . You access each individual value” + “through an integer index . For example,if a is an array” + “of inergers, then a[i] is the ith integer in the array.”; Int arrayCount =0; Int idex = -1; Sting arrarStr =”array”; Index = text.indexof(arrayStr); While(index 0) { ++arrayCount; Index += arrayStr.length(); Index = text.indexof(arrayStr,index); } System.out.println (“the text contains” + arrayCount + “arrays”); } }
A.<
B.=
C.<=
D.>=
冈崎片段是指
A.前导链上合成的DNA片段B.DNA模板上的DNA片段C.随从链上合成的DNA片段D.由DNA连接酶合成的DNA片段E.引物酶催化合成的RNA片段