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【单选题】
以下程序运行结果是( )。 class FatherX{ public Integer getX() { return new Integer(10); } } class Son extends FatherX{ public Double getX() { return new Double(20); } } public class Demo12 { public static void main(String[] args ) { FatherX f = new FatherX(); Son s = new Son(); System. out .println( f .getX()+ s .getX()); } }A.
30
B.
30.0
C.
30.000
D.
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举一反三
【简答题】张某将个人拥有产权的房屋出典给贾某，则贾某为该房屋房产税的纳税人。（ ） 对 错
【单选题】— _______ do you play computer s? —Sometimes.
A.
When
B.
What time
C.
How often
D.
How many
【单选题】How many computer servers does the use around the world to put information on the Internet?
A.
14,000.
B.
40,000.
C.
44,000.
D.
41,000.
【单选题】—______ a week do you use your computer? —Twice.
A.
How often
B.
How soon
C.
How many times
D.
How long
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