下列哪项骨折,为稳定性骨折
A.单一桡骨干的斜骨折
B.股骨干的横骨折
C.伸直型肱骨髁上骨折
D.尺,桡骨双骨的青枝骨折
E.股骨颈骨折内收型
参考答案:D
平面上有四点,过其中任意两点画直线,共可以画不同的直线( )
A.6条
B.6条或4条
C.1条或6条
D.1条或4条或6条
Marry was holidaying with her family in a wildlife park______she was bitten on the leg by a lion.
A.while
B.when
C.before
D.after