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【判断题】
单门限比较器比滞回比较器抗干扰能力强,而滞回比较器比比较器灵敏度高。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】表达式123 + "abc"的值为
【单选题】For two particles with masses of 【图片】and 【图片】，their speeds at some instant are 【图片】and 【图片】，respectively. Which statement is correct?
A.
If and ， the momenta of these two particles must be the same.
B.
If and ， the momenta of these two particles can also be the same.
C.
If and ， the momenta of these two particles can also be the same.
D.
If and ， the momenta of these two particles must be different.
【单选题】If two particles have equal momenta, are their kinetic energies equal?
A.
yes, always
B.
no, never
C.
no, except when their speeds are the same
D.
yes, as long as they move along parallel lines
【简答题】John Smith was a good math student at a high school. He loved his computer. He came home early every day. Then he worked with it till midnight. But John was not a good English student, not good at all...
【简答题】设有定义语句: char s[15]={"123ab\0abc"}; 则表达式 strlen(s) 的值为 。
【单选题】Which two particles would be attracted to each other?
A.
electrons and neutrons
B.
electrons and protons
C.
protons and neutrons
D.
all particles are attracted to each other
【单选题】听力原文：M: The teacher called off the lecture. W: Oh, really? His student John must be disappointed at this news. Q: Who is John ? (5)
A.
Teacher.
B.
Nurse.
C.
Doctor.
D.
Student.
【单选题】John is a good student, ______ his best subject.
A.
as English
B.
English is
C.
English being
D.
being English
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