问题
单项选择题
| 患者，28岁，全口牙齿黄褐色，要求治疗。自述幼时常患病，吃过许多抗菌药。检查见全口牙面均呈黄褐色，未见实质性缺损 |
可以推断，造成该病损的年龄是在
A．1～3岁
B．5岁前
C．8岁前
D．12岁后
E．18岁后
答案
参考答案：C
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| 患者，28岁，全口牙齿黄褐色，要求治疗。自述幼时常患病，吃过许多抗菌药。检查见全口牙面均呈黄褐色，未见实质性缺损 |
可以推断，造成该病损的年龄是在
A．1～3岁
B．5岁前
C．8岁前
D．12岁后
E．18岁后
参考答案：C
| 情景交际。 选择句子，补全对话, 其中有两项是多余的。 | |
| A: It's very late. Are you still on the computer? B: Well, yes. 1. _____ A: What kind of e-mails? B: Some are messages from my friends and some are from the relatives. A: Do you have to write them back right away? B: 2. ____ Usually people want a quick reply. A: 3. _____ B:I've already had 40 people's addresses in my address book! 4. _____ A: 5. _____ E-mail is really very convenient(方便的). | |
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