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问题 单项选择题

人体运动时肌肉工作的直接能源是ATP，其最终的供能形式是（）。

A.有氧氧化供能和无氧氧化供能

B.磷酸原供能和乳酸能供能

C.乳酸能供能和有氧氧化供能

D.糖源供能和乳酸能供能

答案

参考答案：B

解析：ATP、磷酸肌酸（CP）的无氧分解和糖的无氧酵解生成乳酸，释放出能量，再合成三磷酸腺苷供给肌肉的需要。磷酸原有肌酸磷酸、精氨酸磷酸等。

问答题 简答题

试述龙门刨床的优、缺点。
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单项选择题

A typical (160) language contains an applicative sub-language which approximates the mathematical abstractions of "timeless" functions applied to "spaceless" values, where the actual operation sequences and use of storage space during expression evaluation are organized behind the (161) . In this setting, values are data structures of low volume, typically a few computer words or less, which means that an illusion of spacelessness can be realized by having (162) results during expression evaluation stored at the discretion of the language implementation, and effecting parameter (163) and (164) operations through value copying.

A．foreground

B．background

C．screen

D．scenes
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