2千克的羽毛比2千克的铜丝轻．______．
由分析可知：2千克的羽毛比2千克的铜丝一样重；
故答案为：×．
—Is this bike _________?
—No, it's _________. [ ]
A. your, him
B. yours, his
C. you, him
D. your,his
胸壁出血（）
A.颈外动脉栓塞
B.支气管动脉栓塞
C.髂内动脉栓塞
D.颌内动脉栓塞
E.内乳动脉栓塞
