挑错题:A、B、C、D注释标注的哪行代码有错误?public class E {public static void main (String[]args) {String str = new String("ABCABC");int m = str.equals(""); //Abyte [] b = str.getBytes(); //BString s = str.substring(1); //Cchar []c = str.toCharArray(); //D}}
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挑错题:下列A、B、C、D注释标注的哪行代码有错误?public class E {public static void main (String[]args) {String str1 = new String(""); //Aint [] a = {97,98,99};String str2 = new String (a); //Bchar [] c = {'a','b','c'};String str3 = new String (c); //CString str4 = new String(); //DSystem.out.println(str4.equals(""));}}
A
B
C
D
阅读程序题:给出下列【代码】注释标注的代码的输出结果。public class E {public static void main (String[]args) {String str = new String ("苹果");modify(str);System.out.println(str); //【代码】}public static void modify (String s) {s = s + "好吃";}}
组成细胞骨架系统的主要化学成分是
A. 糖类
B. 脂类
C. 核酸
D. 蛋白质
E. 磷酸
微管的形态一般是
A. 双股螺旋状
B. 实心纤维状
C. 中空圆柱状
D. 中空长方状
E. 中空圆球状