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1. |
What is the glass transition temperature of the polymer polymethyl methacrylate? |
A. | 74ᵒ C |
B. | 105ᵒ C |
C. | 93ᵒ C |
D. | 80ᵒ C |
Answer» C. 93¬¨‚à묨¬µ‚àö‚↠C | |