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【单选题】
在内圆磨床上磨削长而削德内圆锥面时,常采用 。
A.
转动工作台
B.
转动头架
C.
转动砂轮架
D.
转动顶尖
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【简答题】表达式123 + "abc"的值为
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【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.
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【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
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【单选题】在Python语言中,表达式len("abc%6s"%"123")的值为( )。
A.
6
B.
7
C.
8
D.
9
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【单选题】表达式“abc,"+"123"的值为( )。
A.
"abc"
B.
"123"
C.
"abc,123"
D.
"abc123"
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【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...
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【简答题】设有定义语句: char s[15]={"123ab\0abc"}; 则表达式 strlen(s) 的值为 。
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【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
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【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.
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【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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【简答题】表达式123 + "abc"的值为
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【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.
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【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
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【单选题】在Python语言中,表达式len("abc%6s"%"123")的值为( )。
A.
6
B.
7
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8
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9
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【单选题】表达式“abc,"+"123"的值为( )。
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"abc"
B.
"123"
C.
"abc,123"
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"abc123"
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【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...
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【简答题】设有定义语句: char s[15]={"123ab\0abc"}; 则表达式 strlen(s) 的值为 。
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【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
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【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.
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【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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