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【多选题】
MCS-51系列单片机的复位电路有两种,即 和 。
A.
上电复位电路
B.
按键复位电路
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【单选题】听力原文: Cambridge is about 86 kilometres northeast of London. It is one of the most beautiful places in Britain. Everything about the city of Cambridge reminds you of its famous university: student on b...
A.
Watching traditional plays.
B.
Visiting the magnificent libraries.
C.
Boating on the river.
D.
Cycling in narrow streets.
【单选题】听力原文: 'Where is the university?' is a question many visitors to Cambridge ask, but no one now could point them in any one direction because there is no campus. The university consists of thirty-one se...
A.
Because there are no signs to direct them.
B.
Because no tour guides are available.
C.
Because all the buildings in the city look alike.
D.
Because the university is everywhere in the city.
【单选题】听力原文:W: Cambridge Business English Certificate is very popular nowadays, but I don't know much about it. Could I ask you some questions? M: My pleasure. W: What is Cambridge Business English Certifica...
A.
A new English Language examination testing four different skills.
B.
An examination testing Reading, Writing, Listening and Speaking.
C.
A new Business English examination having three certificates at three different levels.
D.
A new Business English examination testing certain business knowledge and skills.
【单选题】听力原文: 'Where is the university?' is the question many visitors to Cambridge ask. But no one could point at any one direction because there is no campus. The university consists of 31 self-governing co...
A.
Because there are no signs to direct them.
B.
Because no tour guides are available.
C.
Because all the buildings in the city look alike.
D.
Because the university is everywhere in the city.
【单选题】听力原文: 'Where is the university? is question many visitors to Cambridge ask, but no one could point them in any one direction because there is no campus. The university consists of thirty-one self-gove...
A.
Because there are no signs to direct them.
B.
Because no tour guides are available.
C.
Because all the buildings in the city look alike.
D.
Because the university is everywhere in the city.
【单选题】如果要搜集某一特定群体的有关资料,适宜采用的调查方式是( )
A.
分层抽样
B.
整群抽样
C.
方便抽样
D.
滚雪球抽样
【单选题】如果要搜集某一特定群体的有关资料,适宜采用的调查方式是
A.
系统抽样
B.
整群抽样
C.
滚雪球抽样
D.
判断抽样
【单选题】如果要搜集某一特定群体的有关资料,适宜采用的调查方法是
A.
系统抽样
B.
整群抽样
C.
滚雪球抽样
D.
判断抽样
【单选题】听力原文: 'Where is the university?' is a question many visitors to Cambridge ask, but no one could point them in any one direction because there is no campus. The university consists of thirty - one self...
A.
Because there are no signs to direct them.
B.
Because no tour guides are available.
C.
Because all the buildings in the city look alike.
D.
Because the university is everywhere in the city.
【单选题】听力原文: 'Where is the university?' is the question many visitors to Cambridge ask. But no one could point at any direction because there is no campus. The university consists of 31 self-governing colleg...
A.
Because there are no signs of direction.
B.
Because it lies in a remote place.
C.
Because the university is everywhere in the city.
D.
Because there are no guides available.
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