相对分子质量较高的聚合物，有较大的流动阻力，黏度较大，熔融指数较高，比相对分子质量较低的聚合物容易缠结。
参考答案：错
If you had a chance to go to the 2010 World Expo (世博会), what _______?[ ]
A. will you do
B. would you do
C. would you have done
D. will you have done
某女，经前或经期小腹冷痛，喜暖拒按，经量少，色暗有块，苔白腻，脉沉紧。辨证属
A．阳虚内寒B．气滞血瘀C．寒凝血瘀D．寒湿凝滞E．湿热郁结
