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【多选题】
CD4511 是一片 CMOS BCD—锁存/7 段译码/驱动器，CMOS电路能提供较大的拉电流,可直接驱动共阴LED数码管，以下的硬件译码电路中使用了一片CD4511,下列说法正确的有:【图片】A.
ABCD 为 BCD 码输入，A为最低位。
B.
LT为灯测试端，加高电平时，显示器正常显示，加低电平时，显示器一直显示数码“8”，各笔段都被点亮，以检查显示器是否有故障。 BI为消隐功能端，低电平时使所有笔段均消隐，正常显示时， BI端应加高电平。
C.
CD4511有拒绝伪码的特点，当输入数据越过十进制数9(1001)时，显示字形也自行消隐。
D.
LE是锁存控制端，平时锁存，低电平时传输数据。
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举一反三
【单选题】Why does China plan to send more travelers overseas?
A.
Because China wants to increase its influence on world sports.
B.
Because China hopes to increase its influence on world events.
C.
Because China hopes to increase its influence on Asian events.
D.
Because China wants to increase its influence on its neighbors.
【单选题】The human mind can many tasks that other animals cannot, like using language and judging what other people are thinking．
A.
carry out
B.
take out
C.
put out
D.
bring out
【简答题】Both of the teachers and students believe ______________ (毫无疑问地) that he is honest and dit.
【单选题】--People now can know what' s happening in the world quickly. --You're right. With the help of computers, news can ______ every comer of the world.
A.
get
B.
arrive
C.
return
D.
reach
【单选题】What is NOT the advantage of the new robots?
A.
They can perform. different tasks.
B.
They are easy to reprogram.
C.
They increase productivity.
D.
They perform. a single operation at a time.
【单选题】Why does the writer explain the lack of order and justice in ancient China?
A.
To give details about why no one wanted to listen to Confucius.
B.
To describe the situation in China that Confucius hoped to change.
C.
To point out the impact Confucius had in Chinese society.
D.
To teach about the beginning of the Zhou dynasty.
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