影响噪声对机体作用的因素有哪些?
参考答案:
⑴噪声的强度和频谱特性;⑵接触时间和接触方式;⑶噪声性质;⑷其他有害因素共同存在;⑸机体健康状况以及个人敏感;⑹个体防护。
痤疮的好发部位为()
A.面部
B.颈部
C.胸部
D.背部
E.肩部
按要求完成下列对话,每空一词。
A: Hello, Kate! May I 1 you some questions?
B: 2 !
A: 3 were you born?
B: I was born in January, 1987.
A: 4 were you born?
B: I was born in America.
A: 5 did you come to China.
B: Because my parents worked in China, and I like it very much.
1.______ 2.______ 3.______ 4.______ 5.______