患性，60岁，走路时双脚有踩棉花感，睁眼站立稍不稳，Romber征极明显，双下肢音叉

已知A(4，－3)，B(2，－1)和直线l：4x＋3y－2＝0，求一点P使|PA|＝|PB|，且点P到l的距离等于2.

缺词填空，根据首字母填空. （每空一词 ） (10分）

A mother and her s___小题1:___ get into a bus in a small city and s小题2:   down. The bus conductor(售票员) came to them for them m小题3:  . The mother says, “I w小题4:   one ticket to the zoo.” And gives him one yuan. The conductor l 小题5:  at the small boy for a while and then says to him, “How o小题6: are you, young man?” The mother begins to speak, but the conductor stops h 小题7: . The boy says, “I am seven at home, and four in the b小题8: .” At last, the mother h __小题9:___ to take fifty fen out of her pocket and g__小题10:___ it to the conductor.

人免疫缺陷病毒属于（）

A.单链DNA病毒

B.双链DNA病毒

C.单链RNA病毒

D.双链RNA病毒

E.缺陷型病毒

下列哪些结构由中肾管演化而来（）。

A.附睾管

B.附睾的输出小管

C.输精管

D.射精管

不属于中药产品发明的是（）

A.新的中药有效成分

B.新的中药有效成分制剂

C.新发现的药材

D.新的中药材代用品

E.中药饮片的制备方法