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过滤BaSO4细晶形沉淀,应选用()。
- A、快速定量滤纸
- B、中速定量滤纸
- C、慢速定量滤纸
- D、定性滤纸
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class super { public int getLength() {return 4;} } public class Sub extends Super { public long getLength() {return 5;} public static void main (String[]args) { super sooper = new Super (); Sub sub = new Sub(); System.out.printIn( sooper.getLength()+ “,” + sub.getLength() }; } What is the output?() A、 4, 4B、 4, 5C、 5, 4D、 5, 5E、 The code will not compile.
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class Super { public int getLenght() { return 4; } } public class Sub extends Super { public long getLenght() { return 5; } public static void main(String[] args) {Super sooper = new Super(); Sub sub = new Sub(); System.out.println( sooper.getLenght() + “,” + sub.getLenght() ); } } What is the output? ()A、 4,4B、 4,5C、 5,4D、 5,5E、 Compilation fails.
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pResub1/sub=Resub2/sub/pC
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pResub1/sub=2Resub2/sub /p
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pCHsub4/sub、SOsub2/sub/pC
pSOsub2/sub、CO/pD
pCO、CHsub4/sub、SOsub2/sub/p
考题
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4, 4B
4, 5C
5, 4D
5, 5E
The code will not compile.
考题
单选题A
pIsub2/sub=Isub3/sub/pB
pIsub2/sub=4Isub3/sub/pC
pIsub2/sub=2Isub3/sub/pD
pIsub3/sub=4Isub2/sub/p
考题
判断题硫酸钡属细晶形沉淀,过滤时应选用慢速定量滤纸过滤。A
对B
错
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