屈肘时下列叙述正确的是()
A.肱三头肌收缩,肱二头肌舒张
B.肱二头肌收缩,肱三头肌舒张
C.肱二头肌和肱三头肌收缩
D.肱二头肌和肱三头肌舒张
参考答案:B
What an_______day! After a whole day’s hiking, I am completely_______. [ ]
A. exhausted; exhausted
B. exhausting; exhausting
C. exhausting; exhausted
D. exhausted; exhausting
畸胎瘤多位于()
A.前纵隔
B.前上纵隔
C.后纵隔
D.后上纵隔
E.中纵隔