卷板是用卷板机对板料进行连续三点弯曲的()过程。
A、塑性变形
B、弹性变形
C、弹-塑性变形
参考答案:A
Political parties often differ in their views on various _____ concerning their own countries.
A.ways
B.measures
C.issues
D.patterns
治疗气逆呕吐,首选()
A.半夏、天南星
B.竹茹、枇杷叶
C.旋覆花、白前
D.吴茱萸、生姜
E.旋覆花、代赭石