题干

下列句子中,没有语病的一项是

A:如果患者每天听30分钟自己喜欢的音乐,不仅会使他们精神放松,而且能扩张和清理血管,降低胆固醇水平。

B:通过无数艺人的长期而艰苦的实践,使京剧在舞台艺术方面形成了一套既互相制约又相得益彰的规范化的程式。

C:植物睡眠之谜之所以长期未能得到正确的解释,是因为此前没有人想到决定叶子开合的竟然是两种不同的生理物质。

D:研究小组确定了9个人类生存至关重要的“地球生命支持系统”,并对目前人类的消耗路径和系统的“临界点”进行量化评估。

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C

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    Schools across the world are trying to come up with solutions to keep students active. Some are replacing traditional classroom chairs with exercise balls or standing desks. At Ward Elementary School in Winston, North Carolina students have adopted a new program that requires riding fixed bikes while reading.

    'Read and Ride' is the creation of school counselor Scott Ertl, who came up with the idea while he was exercising and reading at the gym. Believing it would be a fun way to convince students to become more active, he placed one in the corner of his classroom and encouraged them to use it during independent reading classes.

    It was so popular that Ertl decided to add more bikes and offer the Read and Ride program to the entire school. Today Ward Elementary has a dedicated exercise room filled with bikes that can be used by students while completing their daily reading assignments.

    Besides making reading more fun, the program also helps students exercise at a comfortable pace without the pressure that comes with regular sports-related activities. It is also a perfect way to release energy during days when the weather is not helpful to outdoor activities.

    Most importantly, however, are the program's academic benefits. A year after Read and Ride was introduced at Ward Elementary School, students actively involved in the program demonstrated an astonishing 83% reading proficiency. Those that had not taken advantage of the exercise bikes tested at a much lower, 41%.

    Though the substantial improvement in academic achievement cannot all be attributed to programs like Read and Ride, experts believe they are a significant contributor. That's because studies have shown that physical activity stimulates(刺激) brain cells and helps prepare it for learning. As word of the difference made by this easy to execute exercise program spreads, don't be surprised to find schools across the country adopt “Read and Ride” for their students.