第29题: [单项选择]釉质发育不全可见() A. 釉质表面有龋斑,呈黄褐色或黑褐色,失去光泽 B. 釉质表面完整光滑,有光泽大小不一的白色斑块 C. 釉质形态缺陷多累及同一时期发育的一组牙齿 D. 釉质颜色黄褐色,白色相间的花斑,见于同时期发育的一组牙上 E. 窝沟釉质颜色黑褐色,沟底、沟壁的釉质变软 参考答案:C
第30题: [单项选择]有关深Ⅱ度烧伤的描述哪一项是对的。() A. 表皮、真皮深层损伤,靠创缘上皮细胞增殖向中心愈合 B. 表皮、真皮乳头层损伤,靠残存生发层和皮肤附件上皮细胞增殖愈合 C. 表皮、真皮深层损伤,靠残存皮肤附件上皮细胞增殖愈合 D. 表皮、真皮全层及附件全部损毁,靠创缘上皮细胞增殖愈合 E. 表皮、真皮乳头层损伤,靠创缘上皮细胞增殖向中心愈合 参考答案:C 答案解析:
第33题: [简答题]Suppose you have done something wrong to your friend Liu Ming for misunderstanding. Now write a letter to apologize to her. You should write approximately 100 words. Do not sign your own name at the end of your .letter. Use" Han Mei " instead. You do not need to write the address. 参考答案: 答案解析:Dear Liu Ming,
I am so regretted that I am writing this letter of apology to you.
I now real