问题
单项选择题
HP6L激光打印机，更换硒鼓后，打印件上仍出现竖白条纹，故障原因是（）
A.机械故障
B.定影组件
C.扫描组件的反光板及扫描头
D.主板
答案
参考答案：C
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HP6L激光打印机，更换硒鼓后，打印件上仍出现竖白条纹，故障原因是（）
A.机械故障
B.定影组件
C.扫描组件的反光板及扫描头
D.主板
参考答案：C
| 用方框中所给单词填空，每个单词限用一次。 | |
2. —How often do you go fishing? — _________. I think it's kind of boring. 3. Could you please speak more _________? I can hardly follow you. 4. It's my _________ time to visit a foreign country. Things are new to me. 5. —How long have you been in China? —For only one _________. I arrived here in April. |