
(从小到大填写)

①水能 ②太阳能 ③地热能 ④核能
“长江”一直是文人诗词中常见的意象,在这一江之上,寄托了文人各自的悲欢情怀。唐开元年间,诗人王湾在北固山下稍作休息后,天还未亮又开始乘船赶赴前路,面对江水,以“,”流露出了昼夜转接、时序交替之际的乐观积极心态。安史之乱后,杜子美在《登高》中,站在三峡岸边,俯视奔流不息的江水,以“,”的壮景传达出韶光易逝、壮志难酬的沉郁悲凉。北宋时期,死里逃生的苏东坡来到湖北黄州,面对东去的大江,在《念奴娇·赤壁怀古》中以“,”来缅怀历史长河中的英雄豪杰。
Youth sport has the potential to accomplish three important objectives in children's development. First, sport programs can provide youth with opportunities to be physically active, which can lead to improved physical health. Second, youth sport programs have long been considered important to youth's psychosocial development, providing opportunities to learn important life skills such as cooperation, discipline, leadership, and self-control. Third, youth sport programs are critical for the learning of motor skills; these motor skills serve as a foundation for future national sport stars and recreational adult sport participants. When coachers develop activities for youth practices and when sport organizations design youth-sport programs, they must consider the implication of deliberate play and deliberate practice.
Research from Telama (2006) states that regular participation in deliberate play or deliberate practice activities during childhood and youth (ages nine to eighteen) increases the likelihood of participation in sports during adulthood by six times for both males and females. Côté (2002) defines deliberate play activities in sport as those designed to maximize enjoyment. These activities are regulated by flexible rules adapted from standardized sport rules and are set up by the children or by an involved adult. Children typically change rules to find a point where their game is similar to the actual sport but still allows for play at their level. For example, children may change soccer and basketball rules to suit their needs and environment (e.g. in the street. on a playing field or in someone's backyard). When involved in deliberate play activities, children are less concerned with the outcome of their outcome of their behavior. (whether they win or lose) than with the behavior. (having fun).
On the other hand, Ericsson (1993) suggests that the most effective learning occurs through involvement in highly structured activities defined as deliberate practice. Deliberate practice activities require effort, produce no immediate rewards, and are motivated by the goal of improving performance rather than the goal of enjoyment. When individuals are involved in deliberate play, they experiment with different combinations of behaviors, but not necessarily in the most effective way to improve performance. In contrast, when individuals are involved in deliberate practice, they exhibit behavior. focused on improving performance by the most effective means available. For example, the backhand skills in tennis could be learned and improved over time by playing matches or by creating fun practice situations. However, players could more effectively improve their backhand performance by practicing drills that might be considered less enjoyable. Although drills are used in most effective means available practice might not be the most enjoyable, they might be the most relevant to improving performance.
(Note: Answer the questions or complete the statements in NO MORE THAN TEN WORDS)
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的图象与性质. 小强根据学习函数的经验,对函数
的图象与性质进行了研究,下面是其研究过程,请补充完整.
的取值范围是全体实数,
与
的几组对应值列表如下: | | … | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | … |
| | … | 6 | 5 | 4 | | 2 | 1 | 2 | 3 | | 5 | … |
其中,
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