可伸第2、3、4趾的肌是（）
A.跖肌
B.腓肠肌
C.腓骨短肌
D.短伸肌
E.趾短伸肌
参考答案：E
Bob________after his classmate in the classroom when his teacher________.[ ]
A. ran;turned up
B. was running;turned up
C. was running;would turn up
D. had run;would turn up
什么是雷诺数？其表达式是什么？有什么意义？
短伸肌
短伸肌