下图为反射弧的模式图。请分析回答相关问题：
若该图是完成人处于寒冷环境时的体温调节反射弧，则结构1为（）。
参考答案：冷觉感受器
She was certainly not afraid of the dark. ____,it was only a 15-minute ride home. [ ]
A. However
B. Besides
C. Therefore
D. Otherwise
钢筋混凝土的构件中钢筋主要承受拉力。
