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【单选题】
下列关于地址锁存接口芯片74373原理的描述中______是错误的。A.
74373由8个负边沿触发的D触发器和8个负逻辑控制的三态门电路组成
B.
执行片外RAM写指令后，74373的输出端上为低8位地址，输入端则是8位数据
C.
在74373LE端施加一个负脉冲触发信号后，8个D触发器都可完成一次“接通-锁存-隔离”的操作
D.
80C51的ALE引脚是专为地址锁存设计的，其输出脉冲可用作74373的触发信号
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反馈参考答案：
举一反三
【单选题】Given: public class Test { public static void main (String args[]) { class Foo { public int i = 3; } Object o = (Object) new Foo(); Foo foo = (Foo)o; System.out.println(foo.i); } } What is the result?
A.
Compilation will fail.
B.
Compilation will succeed and the program will print “3”
C.
Compilation will succeed but the program will throw a ClassCastException at line 6.
D.
Compilation will succeed but the program will throw a ClassCastException at line 7.
【单选题】Given： What is the result？（）
A.
An exception is thrown at runtime.
B.
r， e， o，
C.
Compilation fails.
D.
r， t， t，
【单选题】Listen to a lecture about Internet Use in Britain and take notes. Use your notes to complete the statements below. Circle A, B or C III.NGeneration InUsers5m38s.mp3: The next generation users create c...
A.
20%
B.
30%
C.
12%
【简答题】Decide which of the words given in the box below would best complete the passage if inserted in the corresponding blank. The words can be used ONCE ONLY. Mark the letter for each word on ANSWER SHEET ...
【简答题】Success often depends on your performance at an interview. For those who are well prepared, it can be a positive experience, and for others it can be a terrifying time. Love them or hate them, 【S1】___...
【单选题】________ your report, what is most important to protect our environment ?
A.
As a result of
B.
Because of
C.
With the help of
D.
According to
【单选题】People who often stay up late are _________ to suffer from heart attacks than those who are not.
A.
six times more likely
B.
as likely six times
C.
six times as likely
D.
more likely six times
【单选题】What is the result？（）
A.
r， t， t，
B.
r， e， o，
C.
Compilation fails.
D.
An exception is thrown at runtime.
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