【单选题】在萃取分离中,分配比是指( )
C.
E = 被萃物在有机相中的量/被萃物在两相中的物质的总量×100%
【单选题】分析下面的 Java 源程序,编译后的运行结果是( )。(选择一项) import java.util.*; public class Test { public static void main(String[ ] args) { int [ ] numbers= new int [ ]{1,2,3}; System. out .println(Arrays. binarySearch (num...
【单选题】There should be laws that prohibit smoking around children.
【单选题】对标准缓冲溶液pH值的计算,正确的说法是( )。
【判断题】溶液的pH值测定公式中pHs是值标准缓冲溶液。
【判断题】液—液萃取分离法中分配比是指溶质在有机相中的总浓度和溶质在水相中的总浓度之比。
【单选题】分析下面的 Java 源程序,编译后的运行结果是( )。(单选题) import java.util.*; public class Test{ public static void main(String[] args){ int[] numbers = new int[]{2,1,3}; Arrays.sort(numbers); System.out.println(Arrays.b...
【单选题】What is the harmful effect of sulfur in a fuel?
A.
It causes excessive smoking and soot at low firing rates
B.
It doesn’t readily burn when combined with oxygen
C.
It clogs fuel oil strainers more often
D.
It forms a corrosive acid when mixed with water or water vapor
【单选题】分析下面的Java源程序,编译后的运行结果是( )。 import java.util.* public class Test{ public static void main(String[] args){ int[] numbers=new int[]{1,2,3}; System.out.println(Arrays.binarySearch(numbers,2)); } }
【单选题】Excessive smoking will injure your body.
D.
Misuse of parts of speech