胸廓的上下径的缩小与_____有关。[ ]
A.膈肌的收缩
B.膈肌的舒张
C.肋骨间的肌肉收缩
D.肋骨间的肌肉舒张
答案:B
对能量的需要,小儿所特有的所需是()
A.基础代谢
B.活动
C.食物的特殊动力作用
D.排泄损失能量
E.生长发育
A semisubmersible which will not remain upright and will assume a list either to port or starboard is likely to have().
A.a large TCG
B.a negative GM
C.excessive ballast
D.insufficient deck load