已知定义在R上的函数$f\left(x\right)$满足$f\left(4\right)=f\left(-2\right)=1$，$f^{\text{'}}\left(x\right)$为$f\left(x\right)$的导函数，且导函数$y=f^{\text{'}}\left(x\right)$的图象如右图所示．则不等式$f\left(x\right)<1$的解集是（   ）

如图所示，对于坐在小轿车里的乘客，司机说他静止的；在路边行走的学生说他运动得很快．司机和小学生谁说得对？为什么？

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    Beijing Opera roles require performers to paint ____( they) faces in patterns and colours to suggest different character types and____(quality).

    In Beijing Opera, facial painting can be quite complex(复杂的). However, in the ____(begin), only three colours____(use)-red, white and black. Now, many other colours, such ____yellow, purple, blue and green, are used for facial painting.

    Red is a colour for____(brave) and loyalty. Guan Yu, a general from the Three Kingdoms Period(AD 220-280) is a good example of this kind of character. He is famous ____being very loyal to his emperor, Liu bei.

    White means all____is bad in human nature. One of the typical white-faced characters is Cao Cao, a____ (power) and cruel prime minister from the Three Kingdoms Period.

    Black face paint is ____(usual) used for someone who is fierce and violent. One typical example is General Zhang Fei from the classic novel, The Romance of the Three Kingdoms.

    All these different colours are used in Beijing Opera facial painting to show a clear picture of each character.

每年隆重举行的国家科学技术奖励大会，对作出突出贡献的科技工作者进行表彰和奖励。这充分体现了党和国家   （   ）
①实施科教兴国和人才强国战略的坚强决心      ②尊重知识、尊重创造、尊重人才

③把发展科技作为国家中心工作的坚强决心      ④对社会主义精神文明建设的高度重视

若﹣a^mb²与 $\frac{1}{3}$ a⁵bⁿ是同类项，则n﹣m=____．