A．胸骨 B．肋骨 C．颅骨 D．四肢长骨 E．脊柱

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问题单项选择题

<6个月的维生素D缺乏性佝偻病患儿多以下列哪项骨骼改变为主()

A．胸骨

B．肋骨

C．颅骨

D．四肢长骨

E．脊柱

答案

参考答案：C

选择题

He lost both of his parents in the big earthquake,but ________ for him,a kind couple adopted him

and took good care of him . [ ]

A. suddenly

B. naturally

C. obviously

D. luckily

单项选择题

某船LBP=68.4m，在Δ=6034t时，纵稳心半径R=79m，则相应的每厘米纵倾力矩MTC=（）×9.81kN.m/cm。

A.77

B.62

C.73

D.70