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如何确定训练大周期的时间？

答案

参考答案：

以成功参加1—2次重大比赛为目标而设计。时间的确定通常采用体现目标控制思想的“倒数时”充填方法，以主要比赛日期为标定点，向回程方向依次确定主要比赛阶段和比赛时期，以及完整的训练大周期。

单项选择题

The number of musicians employed to play accompaniment for radio and television commercials has sharply decreased over the past ten years. This has occurred even though the number of commercials produced each year has not significantly changed for the last ten years.
Which of the following, if it occurred during the past ten years, would contribute LEAST to an explanation of the facts above ？（）

A．The type of music most popular for use in commercials has changed from a type that requires a large number of instruments to a type that requires very few instruments.

B．There has been an increase in the number of commercials that use only the spoken word and sound effects, rather than musical accompaniment.

C．There has been an increase in the number of commercials that use a synthesizer, an instrument on which one musician can reproduce the sound of many musicians playing together.

D．There has been an increase in the number of commercials that use prerecorded music as their only source of music.

E．There has been an increase in the number of commercials that use musicians just starting in the music industry rather than musicians experienced in accompanying commercials.
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