与呕血颜色无关的因素是（）
A.出血发生时间
B.出血量
C.血液在胃内停留时间
D.出血原因
E.出血速度
参考答案：D
根据首字母及汉语提示，完成下列单词的拼写，使句意明确，语言通顺。
1. Where do your parents l______? -In Hebei.
2. —What l________ does Tom speak?
—French.
3. The park near my home is very (脏)____________, I don't like to go there.
4. I'm very ___________(饥饿的), I want some food to have.
5. She often helps her mother with housework (在……期间) ________ the holidays(假日).
传统窄带接入网不能提供的业务有：（）
A、语音接入
B、ISDN
C、ADSL
D、EPON
