A.肱二头肌的收缩 | B.肱三头肌的收缩 |
C.肱二头肌的舒张 | D.肱三头肌的舒张 |
A.杠杆、支点、动力 | B.支点、杠杆、动力 |
C.动力、杠杆、支点 | D.杠杆、动力、支点 |
A.家鸽 | B.蚯蚓 | C.草履虫 | D.蜜蜂 |
A.肱二头肌和肱三头肌都收缩 |
B.肱二头肌收缩,肱三头肌舒张 |
C.肱二头肌和肱三头肌都舒张 |
D.肱二头肌舒张,肱三头肌收 |
A.肱二头肌收缩,肱三头肌舒张 |
B.肱二头肌收缩,肱三头肌收缩 |
C.肱二头肌舒张,肱三头肌收缩 |
D.肱二头肌舒张,肱三头肌舒张 |
A.骨骼和肌肉 | B.关节和肌肉 |
C.骨和肌肉 | D.骨骼、关节和肌肉 |
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