先天性甲状腺功能减退症的最严重后果是()
A.身材矮小
B.智力落后
C.心功能低下、心力衰竭、心包积液
D.腹胀、便秘、脐疝
E.贫血
参考答案:B
He told the interviewer that he had run out of money to buy old bikes.
A.put away
B.turned off
C.taken out
D.used up
下列单项式-x,2x2,-3x3,4x4,…中,第n项是( )。