A.5g B.10g C.20g D.30g E.40g
A.丙烯酸樹(shù)脂III號(hào) B.丙烯酸樹(shù)脂IV號(hào) C.丙烯酸樹(shù)脂Ⅰ號(hào) D.丙烯酸樹(shù)脂Ⅱ號(hào) E.蟲(chóng)膠
A.通入二氧化碳 B.通入氮?dú)?br /> C.通入空氣 D.加入抗壞血酸 E.加入焦亞硫酸氫鈉