申请发明或者实用新型专利的应当提交（）文件。
A、请求书
B、说明书
C、权利要求书
D、以上都是
参考答案：D
以下除哪项外都是妊娠病常见的发病机理（）
A.阴血虚
B.脾肾虚
C.冲气上逆
D.气滞
E.冲任损伤
It is reported that the latest outbreak of the bird flu in Pennsylvania in the United States has prompted China to slap a ban on poultry imports from the state.()
A. marine products
B. dairy products
C. industrial products
D. avian products
