灌肠的禁忌症有()()()的患者;伤寒患者灌肠量不能超过()ml,液面距肛门不得超过()cm
参考答案:
急腹症; 妊娠早期 ;消化道出血 ; 500 ; 30
Researchers have been able to translate brain signals into speech using sensors ____ to the surface
of the brain for the first time.[ ]
A. attached
B. to be attached
C. attaching
D. having been attached
顶端优势是指( )
A.侧芽的发育促进顶芽的发育
B.侧芽的发育抑制顶芽的发育
C.顶芽的发育促进侧芽的发育
D.顶芽的发育抑制侧芽的发育