法的要素主要包括()。
A.法律规则
B.法律原则
C.法律概念
D.法律事实
第1题
A、Tensile fracture
B、Tensile fracture stress
C、Tensile yield
D、Elongation at break
第2题
A.The stress of fatigue is higher than the yield strength of static load
B.Obvious plastic deformation can be observed at fatigue fracture
C.Fatigue fracture can be divided into fatigue source, bright area, rough area
D.The occurrence of fatigue fracture is premonitory and is called brittle fracture
第3题
A、The tensile strength
B、The tensile yield
C、Elongation at break
D、The tensile fracture stress
第5题
A.Brittle material fracture fibrous
B.Ductile materials have no obvious plastic deformation before fracture
C.The fracture of the ductile material is crystalline and shiny
D.The fracture of brittle materials is crystalline or porcelain
第6题
From the passage, we know fluoride ______.
A.prevents fracture because it increases bone density
B.is a safe drag to cure osteoporosis
C.makes fracture more possible because it turns bones brittle
D.is widely used to cure fracture
第8题
A.A.enamel infraction
B.B.crown fracture with pulp exposure
C.C.enamel fracture
D.D.lateral luxation
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