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【多选题】
分析以下程序片段,描述正确的是( )
A.
静态代码块在加载类的时候执行。类只会加载一次,所以静态代码块只会执行一次。
B.
在实际开发中,经常有一些代码需要在类加载时就执行,比如加载数据库驱动,这些代码通常放在静态代码块中。
C.
构造代码块在创建类的实例对象时执行,每次创建类的实例对象时,执行一次构造代码块。
D.
构造代码块优先于构造方法执行,在实际开发中,可以把重载构造方法中重复的代码抽取到构造代码块中执行。
E.
局部代码块定义在方法中,它在方法被调用的时候执行。使用局部代码块是为了限制变量的生命周期,使变量在使用完毕后被尽快回收,从而节省内存空间。
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参考答案:
举一反三
【单选题】How much would the woman pay if she buys four ties?
A.
$120
B.
$60
C.
$108
D.
$30
【单选题】How would the woman get to work?
A.
By bike.
B.
By bus.
C.
By taxi.
【单选题】How would the woman like to have her money?
A.
Four notes of one hundred.
B.
Eight notes of one hundred.
C.
Ten notes of fifty.
D.
Fifteen notes of twenty.
【单选题】How much would the woman require to be paid for the house at the time of buying?
A.
$40,000
B.
$14,000
C.
$ 150,000
【单选题】How would the woman go to the theatre?
A.
By taxi.
B.
By bus.
C.
By subway.
D.
By car.
【单选题】认真阅读楼梯底层平面图,可以知道该楼梯段的级数为
A.
9
B.
10
C.
11
D.
12
【单选题】辅助电路用细线条绘制在原理图的
A.
左侧
B.
右侧
C.
上方
D.
下方
【单选题】How would the woman like to have her money?
A.
four notes of one hundred
B.
eight notes of one hundred
C.
ten notes of fifty
D.
fifteen notes of twenty
【单选题】How would the woman like to have her money? [音频]
A.
Four notes of one hundred.
B.
Eight notes of one hundred.
C.
Ten notes of fifty.
D.
Fifteen notes of twenty.
【单选题】辅助电路用细线条绘制在原理图的
A.
左侧
B.
右侧
C.
下方
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