对于下列哪些种类的费用可以申请减缓缴纳？（）

A．发明专利申请维持费

B．复审费

C．发明专利申请审查费

D．无效宣告请求费

A client with testicular cancer is scheduled for a right orchiectomy. The day before surgery, the client asks the nurse whether losing a testicle will have influence on his manhood. Which of the following facts about orchiectomy should form the basis for the nurse’s response（）

A. Testosterone levels are decreased.

B. Sexual drive and libido are unchanged.

C. Sperm count increases in the remaining testicle.

D. Secondary sexual characteristics change.