固体燃烧物质的燃点低于()为易燃固体。
A、200℃
B、300℃
C、350℃
D、400℃
参考答案:B
Parents ________ much importance to education.They will do their best to give their children that
priceless gift. [ ]
A. attach
B. pay
C. link
D. apply
股骨颈骨折()
A.易发生肱动脉损伤
B.易发生腘动脉损伤
C.易发生缺血性骨坏死
D.易发生坐骨神经损伤