642÷82=2n+1,则n=______.
∵642÷82=(26)2÷(23)2=212÷26=26,
∴n+1=6,
解得n=5.
Do you think it ______ great reward for London to hold _____ Olympic Games in 2012?
A. a; the
B. the; the
C. a; an
D. /’ /
患儿6岁。出生时有颅内出血,现四肢运动障碍明显,张力增高,屈膝、屈肘时常有屈曲性挛缩,膝腱反射亢进,巴氏征阳性。其类型是( )
A.痉挛(偏瘫)型B.痉挛(双瘫)型C.痉挛(四肢瘫)型D.手足徐动型E.震颤型