问题
问答题 简答题
中性和碱性亚硫酸盐法制浆中、木素大分子中哪几种化学键断裂？
答案
参考答案：
酚型或非酚型结构单元α-醚键的反应；蒸煮中的缩合反应；甲基芳基醚键的反应；β-醚键结构在酸性亚硫酸盐蒸煮条件下是稳定的。
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中性和碱性亚硫酸盐法制浆中、木素大分子中哪几种化学键断裂？
参考答案：
酚型或非酚型结构单元α-醚键的反应；蒸煮中的缩合反应；甲基芳基醚键的反应；β-醚键结构在酸性亚硫酸盐蒸煮条件下是稳定的。
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| It's a fine morning. There __1__ many people in the park. What are they __2__ in the park? Some __3__ are playing games. Some __4__ are walking __5__ the lake. Some boys are __6__ basketball. Two girls are __7__ a storybook. What __8__ those men? They're __9__ tea under a big tree. Look! Two cats are __10__ the tree. There are some birds in the tree. They want to catch the birds! | ||||
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