不成对的面颅骨是
A．鼻骨
B．颧骨
C．腭骨
D．下颌骨
E．上颌骨
参考答案：D
解析：不成对的面颅骨有下颌骨、犁骨、舌骨。
根据句意及所给首字母, 完成下列单词.
1. My aunt works in a hospital. She is a __________．She often helps the doctor.
2. I want to buy a new pen, but I have no m __________.
3. Jackie Chan is a famous (著名的) a __________．
4. I like music very much and l want to be a m __________.
5. He has a busy job as a w __________ in a restaurant.
煤层注水时通常超前时间需要（）天。
A、5～10
B、10～15
C、20～30
