胸外伤后肺水肿和肺毛细胞血管出血原因是（）。
A.损伤性窒息
B.肺爆震伤
C.开放性气胸
D.损伤性血胸
E.闭合性气胸
参考答案：B
根据句意和汉语注释，写出单词的正确形式。
1. Millie gets a lot of __________(礼物) for her birthday every year.
2. Tom is very (礼貌的) to the teachers.
3. At weekends, my parents often take me to a___________(餐馆) to have dinner.
4. These sports clothes are those football ___________(运动员).
5. My ________(最喜欢的)color is red..
氟化物防龋属于（）。
A.龋病一级预防
B.龋病二级预防
C.龋病三级预防
D.以上都不是
E.属于治疗，不是预防
