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【单选题】
关于义齿基材料,下列叙述正确的是( )A.
热凝义齿基托材料固化后泛黄、残留单体多、力学性能较差。
B.
自凝义齿基托材料固化后缓慢变色、残留单体多、力学性能较差。
C.
热凝义齿基托材料固化后色泽性能好、力学性能好，但残留单体较多。
D.
光固化义齿基托材料固化后色泽性能好、残留单体量少，但尺寸精确性差。
E.
自凝义齿基托材料固化后强度高,色泽美观, 适宜制作永久义齿基托。
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【单选题】I've tried very hard to improve my English. But by no means with my progress.
A.
the teacher is not satisfied
B.
is the teacher not satisfied
C.
the teacher is satisfied
D.
is the teacher satisfied
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