组织采用的外部试验室进行试验,必须在其试验室范围内,另外对其的要求是:()。
A.该试验室必须得到顾客认可
B.必须ISO/IEC17025认可
C.A和B
D.A或B
参考答案:D
--- The little girl dances so well. Where was she trained?
-- She learns all by herself. She ______ goes to any training class.
A.usually
B.often
C.even
D.never
不稳定性骨折是
A.嵌插性骨折
B.粉碎性骨折
C.斜形骨折
D.青肢骨折
E.螺旋性骨折