单选题安静时，正常机体能量代谢最为稳定的环境温度为<br/> <br>A. 10-20<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20231118/2042781_0.jpg"> <br>B. 20-30<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20231118/2042781_0_1.jpg"> <br>C. 30 -37 <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20231118/2042781_0_2.jpg"><br>D. 37<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20231118/2042781_0_3.jpg">