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【简答题】
如果现在你不能勇于面对自己的错误,那么将来有可能会重蹈覆辙。 If you can’t face up to your mistake now, you it in the future.
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【简答题】用所给动词的适当形式填空。 A smaller number of parents send messages 1 ( ask ) for suggestions for their sons or daughters. I was at Harvard for three years before 2 (drop) out. We discourage 3 (drop)out. 4 ( have...
【单选题】一平面简谐波沿x轴负方向传播．已知x = x0处质点的振动方程为y=Acos(ωt+φ0)．若波速为u，则此波的表达式为
A.
y =Acos{ ω [ t -( x 0 -x ) / u ]+ φ 0 }
B.
y =Acos{ ω [ t -( x-x 0 ) / u ]+ φ 0 }
C.
y =Acos{ ω [ t+ ( x 0 -x ) / u ]+ φ 0 }
D.
y =Acos{ ω [ t+ ( x-x 0 ) / u ]+ φ 0 }
【简答题】In the world there are different forms of family groups. In modern western societies, a family group is usually small, made up of a man, his wife, and his children. About a hundred years ago, it was u...
【简答题】A smaller number of parents send messages ________ for suggestions for their sons or daughters. (ask)
【单选题】一平面简谐波沿x轴负方向传播．已知x＝x0处质点的振动方程为y＝Acos(w t+f0)．若波速为u，则此波的波动方程为
A.
y ＝ A cos ｛ w ［ t －（ x 0 － x ）／ u ］＋ f 0 ｝．
B.
y ＝ A cos ｛ w ［ t －（ x － x 0 ）／ u ］＋ f 0 ｝．
C.
y ＝ A cos ｛ w t －［（ x 0 － x ）／ u ］＋ f 0 ｝．
D.
y ＝ A cos ｛ w t ＋［（ x 0 － x ）／ u ］＋ f 0 ｝．
【简答题】FileInputStream实现对磁盘文件的读取操作,在读取字符的时候,它一般与_________和_________一起使用。
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