A 被采表面<100cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0.gif">,取其1/2表面积 B
被采表面>100cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_1.gif">,取30cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_2.gif"> C
被采表面>100cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_3.gif">,取50cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_4.gif"> D
被采表面>100cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_5.gif">,取60cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_6.gif"> E
被采表面>100cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_7.gif">,取100cm<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13362677_0_8.gif">