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【自古英雄出少年 〈 ( ̄) ̄ ) 〈 你已 获得 ❤ ❤ ❤ 今天看来不妙,可能要被反按在地上摩擦摩擦了 。 千山万水总是情,饶命行不行】 4 .如图所示,光滑的水平面上放着一块木板,木板处于静止状态,其质量 M = 2.0 kg. 质量 m = 1.0 kg 的小物块 ( 可视为质点 ) 放在木板的最右端.现对木板施加一个水平向右的恒力 F ,使木板与小物块发生相对滑动.已知 F = 6 N ,小物块与木板之间的动摩擦因数 μ = 0.10 , g 取 10 m/s 2 . (1) 求木板开始运动时的加速度大小; (2) 在 F 作用 1 s 后将其撤去,为使小物块不脱离木板,木板至少多长?
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【单选题】In the passage, the author includes all of the following EXCEPT______.
A.
a business principle
B.
a definition of productivity
C.
an example of a successful company
D.
an illustration of a process technology.
【简答题】When students know about the reasons for tests, they will approach them with ______.
【简答题】Most students believe that teachers know exactly how to put their compositions . A ． correct B ． straight C ． right D ． well
【单选题】According to the author, all the students know that ______.
A.
there are great differences among the lecturers as to their quality of teaching
B.
quite a lot of teachers can produce the results students desire
C.
they must be inspired to learn
D.
it is too dull to attend lectures
【简答题】When students know about the reasons for taking tests, they will approach them with ______.
【单选题】we are reconsidering those trade terms_____might be adverse to the interest of our principals.
A.
what
B.
that
C.
when
D.
where
【单选题】---What did Miss Liu want to know? ---She wanted to know___.
A.
where did the other students go?
B.
that her students could come back.
C.
what her students have done during the trip?
D.
if her students were hurt in the accident.
【单选题】---Do you know if foreign students _______school uniform? --- Yes. Most British students do so.
A.
dress
B.
dress up
C.
put on
D.
wear
【简答题】A．If the students are confused about the subject. B．If the students don't know how to combine subject with degree. C．If the students don't get any suggestion about the career. D．If the students don't ...
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