晶体管静态放大倍数β表示（），其中用IC表示集电极直流电流，IB表示基极直流电流。A

与命题“若x∈A，则y∉A”等价的命题是（　　）

A．若x∉A，则y∉A

B．若y∉A，则x∈A

C．若x∉A，则y∈A

D．若y∈A，则x∉A

You may know the song Happy Birthday very well, but do you know about its writer? It___小题1:________(write) by an American girl. And she has become a very rich woman. When she was a child , she was poor. Once she was invited to her friends’ birthday party. She had no money_____小题2:_____( buy) presents for them. She was sad. Her mother said “小题3:__(not worry). How about ___小题4:____(sing) a song together? Happy birthday to…” She decided to write it down and ____小题5:_(sing) it to her friends at the party. They sang and sang “We_____小题6:___(not hear) such a song before.” The party ended up singing a song. Later the girl became well known in America.

全胃肠外营养的糖代谢异常并发症，不包括（）。

A.高血糖

B.低血糖

C.非酮症昏迷

D.肝功能损害

E.电解质紊乱

下列为成年男性红细胞计数的正常值的是

A．3.0×10¹²～9.0×10¹²/L
B．4.0×10¹²～5.0×10¹²/L
C．4.0×10¹²～9.0×10¹²/L
D．3.0×10¹²～10.0×10¹²/L
E．4.0×10¹²～11.0×10¹²/L

治疗胃痛，循经取穴可取

A．内关

B．合谷

C．足三里

D．三阴交

E．丰隆