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【多选题】
对消除误码方法，下列哪种说法是错误的？A.
适当增加发送信号功率 ；
B.
选择抗噪声性能好的调制解调方式 ；
C.
采用 ASK方式 。
D.
采用 PCM 编码。
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举一反三
【单选题】It can be inferred that the author of the passage expects that the experience of the student mentioned as having studied Wife in the Right would ______.
A.
lead the student to disregard information found in the Bibliotheca Britannica
B.
teach the student to question the accuracy of certain kinds of information sources when studying neglected authors
C.
teach the student to avoid the use of reference sources in studying neglected authors
D.
help the student to understand the importance of first editions in establishing the authorship of plays
【单选题】It can be inferred that the author of the passage expects that the experience of the student mentioned as having studied Wife in the Right, would have one of the following effects.
A.
It would lead the student to disregard information found in the Bibliotheca Britannica.
B.
It would teach the student to question the accuracy of certain kinds of information sources when studying neglected authors.
C.
It would teach the student to avoid the use of reference sources in studying neglected authors.
D.
It would enhance the student's appreciation of the works of authors not included in the canon.
【单选题】It can be inferred from the passage that_____.
A.
the teacher should correct errors in students' paper
B.
the teacher should indicate errors in students' papers and ask them to rewrite their papers
C.
the teacher should encourage students on their papers
D.
the teacher should ask students to rewrite their papers
【简答题】用手钳剪铁丝时，手的握力P 1 =50N，握力点距钳的支点为L 1 为130mm，铁丝受力点距钳的支点L 2 为15mm，求在铁丝上产生多大的力P 2 ？
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