高聚物的力学性能主要是测定材料的强度和（）以及变形.
参考答案：模量
Chinese news reported today that a woman in Hongbai had been rescued after ____ in a tunnel for nine days.
A．trapping
B．being trapped
C．having trapped
D．to be trapped
订立合同的基本原则有哪些？（合同监管岗位）
