问题
单项选择题 A1型题
用四环素族类药物可致恒牙发生四环素牙的时期是（）
A.胚胎6个月
B.胚胎4个月
C.出生以前
D.7岁以前
E.8岁以后
答案
参考答案：D
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用四环素族类药物可致恒牙发生四环素牙的时期是（）
A.胚胎6个月
B.胚胎4个月
C.出生以前
D.7岁以前
E.8岁以后
参考答案：D
| 阅读理解。 | ||||||||||||
Internet Forum (论坛) | ||||||||||||
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| A. Andy is a better singer. B. Jacky is a better singer. C. They both sing well. D. Jacky is a better actor. | ||||||||||||
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| A. Jacky has no experience singing in Mandarin B. Cantonese is his first language C. His Mandarin pronunciation is bad. D. Jacky's Mandarin songs are boring | ||||||||||||
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| A. Nobody likes Andy's Movies. B. 1000 reasons has the same opinion as Lindalee. C.1000 reasons thinks Andy's voice is more special than Jacky's D.Andyfan has never seen an Andy Lau's concert. |