对有限溶胀和无限溶胀过程都比较快的大分子化合物不应采用加热与搅拌的方式,而宜用自然溶胀达到溶解平衡。
A.正确
B.错误
正确答案是A
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Passage 3 Questions 11 to 15 are based on the following passage. Icons are objects in our environment that evoke deeply-felt emotional responses from those for whom they have a special, shar