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【单选题】
正常人吸入下列哪种混合气体时，肺通气量增加最明显A.
21% O 2 和 79%N 2
B.
17% O 2 和83%N 2
C.
2%CO 2 和98%O 2
D.
20%CO 2 和80%O 2
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【简答题】a=set() a.add('py') a.update('th') print(a)
【单选题】One of the measures to keep a car within the speed limit is______.
A.
to add less fuel to the engine
B.
to limit the use of accelerator
C.
to push down the accelerator pedal
D.
to remove the pedal from accelerator
【单选题】To add refrigerant to the high side of an air conditioning system, you should introduce the refrigerant through the .
A.
discharge service valve as a vapor
B.
suction service valve as a liquid
C.
charging valve as a liquid
D.
condenser purge valve as a vapor
【单选题】下列除哪一项外,都是膝关节的结构特点?( )
A.
关节囊内有前、后交叉韧带和半月板
B.
关节囊外的内外侧分别有胫侧和腓侧副韧带加强
C.
关节前面有髌骨和髌韧带
D.
可绕冠状轴和垂直轴运动
【单选题】下列除哪一项外,都是膝关节的结构特点
A.
关节囊内有前、后交叉韧带和半月板
B.
关节囊外的内外侧分别有胫侧和腓侧副韧带加强
C.
关节前面有髌骨和髌韧带
D.
可绕额状轴和垂直轴运动
【单选题】听力原文： Dozens of recording stars began converging on a Hollywood studio Monday to add their voices to a song they hope will raise millions of dollars for Haitian earthquake relief25. The words and musi...
A.
To raise money for African humanitarian efforts.
B.
To raise money for Haitian earthquake victims.
C.
To sing in memory of Michael Jackson.
D.
To make a recording of the original version of the song.
【单选题】下列除哪一项外,都是膝关节的结构特点( )
A.
关节囊内有前、后交叉韧带和半月板
B.
关节囊外分别有胫侧和腓侧副韧带加强
C.
关节前面有髌韧带和髌骨
D.
可绕额状轴和垂直轴运动
【单选题】A prefix can add some meaning related to
A.
procedure
B.
body system
C.
disorder
D.
number
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