【单选题】对血液中几个生理概念的叙述,下列选项错误的是( )
D.
血细胞占全血总容积的40%~50%,其余为血浆
【单选题】对血液中几个生理概念的叙述,错误的是
A.
血细胞约占全血总容积的40%~50%,其余为血浆
【单选题】如图所示的电路中,若晶体管的饱和压降 ,则输入信号的振幅不得超过 。
【单选题】债券的收益率曲线为“正向”,表明当债券期限增加时,收益率将()。
【单选题】(直流通路和交流通路)电路如图 所示,已知晶体管 β = 50 , V CC = 12V ,晶体管饱和管压降 U CES = 0.5V 。当 R b1 短路时, 用直流电压表测晶体管的集电极电位为多少?( )
【单选题】A ) They manage to cooperate well with their teammates . B ) They use effective tactics to defeat their competitors . C ) They try hard to meet the spectators ’ expectations . D ) They attach great im...
A.
They manage to cooperate well with their teammates .
B.
They use effective tactics to defeat their competitors .
C.
They try hard to meet the spectators ’ expectations .
D.
They attach great importance to high performance .
【单选题】有关鼻腔异物取出哪一项是不恰当的()
C.
较大异物不能从前鼻孔取出者,可将异物推向鼻咽部,由嘴里吐出
【单选题】军事竞争既是一个______机制,也是一个______机制,不同诸侯国家采取了各种政权建设尝试,那些不能获得军事竞争胜利的被淘汰;即使采取了改革,国家也可能在军事竞争中失败,但诸侯国之间的交流、学习和模仿等使得有利于军事竞争获胜的制度被保留并进一步完善。